8-letter words containing SI
Embark on an exploration of 8-letter words that contain the letter SI. This segment uncovers the diverse range of words that incorporate SI within this specific length, revealing the versatility and richness of language. Ideal for vocabulary enthusiasts and word-game aficionados.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| business | 10 | a commercial or industrial enterprise and the people who constitute it | he bought his brother's business |
| possible | 12 | existing in possibility | possible uses of nuclear power |
| position | 10 | a condition or position in which you find yourself | the unpleasant situation (or position) of having to choose between two evils |
| decision | 11 | the act of making up your mind about something | the burden of decision was his |
| consider | 11 | show consideration for; take into account | You must consider her age |
| possibly | 15 | by chance | we may possibly run into them at the concert |
| positive | 13 | involving advantage or good | a plus (or positive) factor |
| physical | 18 | impelled by physical force especially against resistance | a real cop would get physical |
| opposite | 12 | directly facing each other | they sat opposite at the table |
| designed | 11 | done or made or performed with purpose and intent | style...is more than the deliberate and designed creation |
| visiting | 12 | the activity of making visits | the purpose was to promote homes, clubs, visiting, and other services |
| division | 12 | a group of ships of similar type | - |
| monsieur | 10 | used as a French courtesy title; equivalent to English `Mr' | - |
| occasion | 12 | an event that occurs at a critical time | it was needed only on special occasions |
| blessing | 11 | a desirable state | enjoy the blessings of peace |
| crossing | 11 | a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other | - |
| dressing | 10 | making fertile as by applying fertilizer or manure | - |
| designer | 10 | someone who specializes in graphic design | - |
| illusion | 8 | an illusory feat; considered magical by naive observers | - |
| analysis | 11 | a set of techniques for exploring underlying motives and a method of treating various mental disorders; based on the theories of Sigmund Freud | his physician recommended psychoanalysis |
| musician | 12 | someone who plays a musical instrument (as a profession) | - |
| guessing | 10 | an estimate based on little or no information | - |
| assigned | 10 | appointed to a post or duty | assigned personnel |
| sickness | 14 | impairment of normal physiological function affecting part or all of an organism | - |
| invasion | 11 | any entry into an area not previously occupied | an invasion of tourists |
| hesitate | 11 | interrupt temporarily an activity before continuing | - |
| sensible | 10 | able to feel or perceive | even amoeba are sensible creatures |
| pressing | 11 | compelling immediate action | too pressing to permit of longer delay |
| accusing | 13 | containing or expressing accusation | his accusing glare |
| resident | 9 | used of animals that do not migrate | - |
| sessions | 8 | United States composer who promoted 20th century music (1896-1985) | - |
| sidewalk | 16 | walk consisting of a paved area for pedestrians; usually beside a street or roadway | - |
| refusing | 12 | - | - |
| forensic | 13 | of, relating to, or used in public debate or argument | - |
| resigned | 10 | - | - |
| silently | 11 | without speaking | - |
| sideways | 15 | to, toward or at one side | - |
| sinister | 8 | stemming from evil characteristics or forces; wicked or dishonorable | the scheme of some sinister intelligence bent on punishing him |
| parasite | 10 | a follower who hangs around a host (without benefit to the host) in hope of gain or advantage | - |
| outsider | 9 | someone who is excluded from or is not a member of a group | - |
| focusing | 14 | the concentration of attention or energy on something | - |
| opposing | 13 | characterized by active hostility | opponent (or opposing) armies |
| eyesight | 15 | normal use of the faculty of vision | - |
| decisive | 14 | forming or having the nature of a turning point or crisis | - |
| backside | 17 | the side of an object that is opposite its front | - |
| hypnosis | 16 | a state that resembles sleep but that is induced by suggestion | - |
| classics | 12 | study of the literary works of ancient Greece and Rome | - |
| uprising | 11 | organized opposition to authority; a conflict in which one faction tries to wrest control from another | - |
| sidekick | 19 | a close friend who accompanies his buddies in their activities | - |
| cruising | 11 | - | - |
| delusion | 9 | (psychology) an erroneous belief that is held in the face of evidence to the contrary | - |
| exposing | 18 | - | - |
| pleasing | 11 | giving pleasure and satisfaction | a pleasing piece of news |
| homesick | 19 | longing to return home | - |
| praising | 11 | full of or giving praise | - |
| assisted | 9 | having help; often used as a combining form | - |
| silenced | 11 | reduced to silence | the silenced crowd waited expectantly |
| bruising | 11 | brutally forceful and compelling | protected from the bruising facts of battle |
| sizzling | 27 | characterized by intense emotion or interest or excitement | sizzling political issues |
| roadside | 10 | edge of a way or road or path | - |
| imposing | 13 | impressive in appearance | an imposing residence |
| emphasis | 15 | special importance or significance | the red light gave the central figure increased emphasis |
| situated | 9 | situated in a particular spot or position | nicely situated on a quiet riverbank |
| campsite | 14 | a site where people on holiday can pitch a tent | - |
| silicone | 10 | any of a large class of siloxanes that are unusually stable over a wide range of temperatures; used in lubricants and adhesives and coatings and synthetic rubber and electrical insulation | - |
| incision | 10 | the cutting of or into body tissues or organs (especially by a surgeon as part of an operation) | - |
| dialysis | 12 | separation of substances in solution by means of their unequal diffusion through semipermeable membranes | - |
| sighting | 13 | the act of observing | several sightings of enemy troops were reported |
| simulate | 10 | make a pretence of | - |
| singular | 9 | beyond or deviating from the usual or expected | singular behavior |
| popsicle | 14 | ice cream or water ice on a small wooden stick | in England a popsicle is called an ice lolly |
| silencer | 10 | a tubular acoustic device inserted in the exhaust system that is designed to reduce noise | - |
| feasible | 13 | capable of being done with means at hand and circumstances as they are | - |
| revision | 11 | the act of rewriting something | - |
| residual | 9 | something left after other parts have been taken away | - |
| hesitant | 11 | lacking decisiveness of character; unable to act or decide quickly or firmly | - |
| physique | 25 | constitution of the human body | - |
| hillside | 12 | the side or slope of a hill | - |
| simplify | 18 | make simpler or easier or reduce in complexity or extent | We had to simplify the instructions |
| aversion | 11 | a feeling of intense dislike | - |
| absinthe | 13 | aromatic herb of temperate Eurasia and North Africa having a bitter taste used in making the liqueur absinthe | - |
| downside | 13 | a negative aspect of something that is generally positive | there is a downside even to motherhood |
| insignia | 9 | a badge worn to show official position | - |
| sideshow | 15 | a minor show that is part of a larger one (as at the circus) | - |
| adhesive | 15 | a substance that unites or bonds surfaces together | - |
| classify | 16 | arrange or order by classes or categories | How would you classify these pottery shards--are they prehistoric? |
| ambrosia | 12 | a mixture of nectar and pollen prepared by worker bees and fed to larvae | - |
| browsing | 14 | the act of feeding by continual nibbling | - |
| jurassic | 17 | from 190 million to 135 million years ago; dinosaurs; conifers | - |
| obsidian | 11 | acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces | - |
| besieged | 12 | surrounded by hostile forces | the besieged town |
| neurosis | 8 | a mental or personality disturbance not attributable to any known neurological or organic dysfunction | - |
| arousing | 9 | - | - |
| envision | 11 | picture to oneself; imagine possible | I cannot envision him as President |
| invasive | 14 | gradually intrusive without right or permission | invasive tourists |
| revising | 12 | editing that involves writing something again | - |
| infusion | 11 | a solution obtained by steeping or soaking a substance (usually in water) | - |
| lovesick | 17 | languishing because of love | strong men behaving like lovesick boys |
| sideline | 9 | a line that marks the side boundary of a playing field | - |
| singsong | 10 | uttered in a monotonous cadence or rhythm as in chanting | a singsong manner of speaking |
| redesign | 10 | design anew, make a new design for | - |
| prussian | 10 | a German inhabitant of Prussia | - |
| coursing | 11 | hunting with dogs (usually greyhounds) that are trained to chase game (such as hares) by sight instead of by scent | - |
| signaled | 10 | - | - |
| basilica | 12 | a Roman building used for public administration | - |
| emission | 10 | the act of emitting; causing to flow forth | - |
| capsized | 22 | - | - |
| residing | 10 | - | - |
| sensibly | 13 | with good sense or in a reasonable or intelligent manner | he acted sensibly in the crisis |
| lopsided | 12 | turned or twisted toward one side | - |
| desiring | 10 | - | - |
| abrasive | 13 | causing abrasion | - |
| ringside | 10 | first row of seating; has an unobstructed view of a boxing or wrestling ring | - |
| fibrosis | 13 | development of excess fibrous connective tissue in an organ | - |
| desirous | 9 | having or expressing desire for something | desirous of high office |
| unsigned | 10 | lacking a signature | the message was typewritten and unsigned |
| sixpence | 19 | a small coin of the United Kingdom worth six pennies; not minted since 1970 | - |
| sizeable | 19 | fairly large in size | - |
| signpost | 11 | a post bearing a sign that gives directions or shows the way | - |
| cohesion | 13 | the state of cohering or sticking together | - |
| synopsis | 13 | a sketchy summary of the main points of an argument or theory | - |
| omission | 10 | any process whereby sounds or words are left out of spoken words or phrases | - |
| devising | 13 | the act that results in something coming to be | the devising of plans |
| sinkhole | 15 | a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof | - |
| amnesiac | 12 | suffering from a partial loss of memory | - |
| lakeside | 13 | the shore of a lake | - |
| sightsee | 12 | visit famous or interesting sights | - |
| allusion | 8 | passing reference or indirect mention | - |
| phrasing | 14 | the manner in which something is expressed in words | - |
| presidio | 11 | a fortress established in the southwestern United States by the Spanish in order to protect their missions and other holdings | Tucson was first settled as a walled presidio |
| fireside | 12 | home symbolized as a part of the fireplace | fighting in defense of their firesides |
| derision | 9 | the act of deriding or treating with contempt | - |
| burnside | 11 | facial hair that has grown down the side of a man's face in front of the ears (especially when the rest of the beard is shaved off) | - |
| downsize | 21 | design or manufacture in a smaller size | the car makers downsized the SUVs when fuel became very expensive |
| gossiped | 12 | - | - |
| necrosis | 10 | the localized death of living cells (as from infection or the interruption of blood supply) | - |
| classier | 10 | - | - |
| abrasion | 10 | erosion by friction | - |
| reassign | 9 | transfer somebody to a different position or location of work | - |
| dossiers | 9 | - | - |
| excusing | 18 | - | - |
| narcosis | 10 | unconsciousness induced by narcotics or anesthesia | - |
| clumsily | 15 | in a clumsy manner | he snatched the bills clumsily |
| silkworm | 17 | larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon | - |
| bassinet | 10 | a basket (usually hooded) used as a baby's bed | - |
| bursitis | 10 | inflammation of a bursa; frequently in the shoulder | - |
| emulsion | 10 | a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin | - |
| fantasia | 11 | a musical composition of a free form usually incorporating several familiar themes | - |
| cohesive | 16 | causing cohesion | a cohesive agent |
| sisterly | 11 | like or characteristic of or befitting a sister | sisterly kindness |
| perusing | 11 | reading carefully with intent to remember | - |
| effusive | 17 | uttered with unrestrained enthusiasm | - |
| illusive | 11 | based on or having the nature of an illusion | illusive hopes of finding a better job |
| musicale | 12 | - | - |
| positron | 10 | an elementary particle with positive charge; interaction of a positron and an electron results in annihilation | - |
| sidestep | 11 | avoid or try to avoid fulfilling, answering, or performing (duties, questions, or issues) | - |
| sickroom | 16 | a room to which a sick person is confined | - |
| phimosis | 15 | an abnormal tightness of the foreskin preventing retraction over the glans | - |
| easiness | 8 | a feeling of refreshing tranquility and an absence of tension or worry | the easiness we feel when sleeping |
| ironside | 9 | a man of great strength or bravery | - |
| misusing | 11 | - | - |
| offsides | 15 | illegally beyond a prescribed line or area or ahead of the ball or puck | - |
| deposing | 12 | - | - |
| divisive | 15 | dissenting (especially dissenting with the majority opinion) | - |
| incisive | 13 | having or demonstrating ability to recognize or draw fine distinctions | incisive comments |
| lousiest | 8 | - | - |
| magnesia | 11 | a white solid mineral that occurs naturally as periclase; a source of magnesium | - |
| defusing | 13 | the act of deactivating or making ineffective (as a bomb) | - |
| debasing | 12 | used of conduct; characterized by dishonor | - |
| sikorsky | 19 | United States industrialist (born in Russia) who designed the first four-engine airplane and the first mass-produced helicopter (1889-1972) | - |
| silicate | 10 | a salt or ester derived from silicic acid | - |
| elapsing | 11 | - | - |
| malvasia | 13 | grape used to make malmsey wine | - |
| messiest | 10 | - | - |
| stenosis | 8 | abnormal narrowing of a bodily canal or passageway | - |
| sixtieth | 18 | one part in sixty equal parts | - |
| quayside | 21 | - | - |
| oversize | 20 | larger than normal for its kind | - |
| adhesion | 12 | the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | a heated hydraulic press was required for adhesion |
| ellipsis | 10 | omission or suppression of parts of words or sentences | - |
| excision | 17 | the omission that is made when an editorial change shortens a written passage | both parties agreed on the excision of the proposed clause |
| greasier | 9 | - | - |
| gutsiest | 9 | - | - |
| cyanosis | 13 | a bluish discoloration of the skin and mucous membranes | - |
| derisive | 12 | abusing vocally; expressing contempt or ridicule | derisive laughter |
| triassic | 10 | from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity | - |
| sideward | 13 | toward one side | turn the figure sideward |
| resistor | 8 | an electrical device that resists the flow of electrical current | - |
| basilisk | 14 | ancient brass cannon | - |
| acidosis | 11 | abnormally high acidity (excess hydrogen-ion concentration) of the blood and other body tissues | - |
| dockside | 16 | the region adjacent to a boat dock | - |
| cytosine | 13 | a base found in DNA and RNA and derived from pyrimidine; pairs with guanine | - |
| curbside | 13 | the side of a sidewalk that is bordered by a curb | policemen stood at intervals along the curbside |
| capsicum | 16 | chiefly tropical perennial shrubby plants having many-seeded fruits: sweet and hot peppers | - |
| sideburn | 11 | facial hair that has grown down the side of a man's face in front of the ears (especially when the rest of the beard is shaved off) | - |
| synapsis | 13 | the side by side pairing of homologous maternal and paternal chromosomes at the start of meiosis | - |
| uneasily | 11 | with anxiety or apprehension | - |
| sidelong | 10 | (used especially of glances) directed to one side with or as if with doubt or suspicion or envy | sidelong glances |
| braising | 11 | cooking slowly in fat in a closed pot with little moisture | - |
| brindisi | 11 | a port city in southeastern Apulia in Italy; a center for the Crusades in the Middle Ages | - |
| dumpsite | 13 | a piece of land where waste materials are dumped | - |
| drowsily | 15 | in a drowsy manner | `Time to get up,' she said drowsily |
| drowsing | 13 | half asleep | it seemed a pity to disturb the drowsing (or dozing) professor |
| effusion | 14 | an unrestrained expression of emotion | - |
| encasing | 11 | - | - |
| doorsill | 9 | the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway | - |
| jalousie | 15 | a window with glass louvers | - |
| geodesic | 12 | of or relating to or determined by geodesy | - |
| glossies | 9 | - | - |
| lordosis | 9 | an abnormal inward (forward) curvature of the vertebral column | - |
| noisiest | 8 | - | - |
| outsized | 18 | larger than normal for its kind | - |
| unsifted | 12 | - | - |
| sicklied | 15 | - | - |
| simoleon | 10 | - | - |
| simonize | 19 | polish with wax | - |
| sinfully | 14 | - | - |
| singeing | 10 | - | - |
| apposite | 12 | being of striking appropriateness and pertinence | the successful copywriter is a master of apposite and evocative verbal images |
| artesian | 8 | (of water) rising to the surface under internal hydrostatic pressure | an artesian well |
| brassier | 10 | - | - |
| dressier | 9 | - | - |
| emersion | 10 | the act of emerging | - |
| exegesis | 16 | an explanation or critical interpretation (especially of the Bible) | - |
| feasibly | 16 | in a practicable manner; so as to be feasible | - |
| grousing | 10 | - | - |
| infusing | 12 | - | - |
| gaussian | 9 | of or relating to Karl Gauss or his mathematical theories of magnetics or electricity or astronomy or probability | - |
| ossified | 12 | set in a rigidly conventional pattern of behavior, habits, or beliefs | an ossified bureaucratic system |
| cheesing | 14 | - | - |
| clumsier | 12 | - | - |
| cosiness | 10 | a state of warm snug comfort | - |
| cosigner | 11 | one of two or more signers of the same document (as a treaty or declaration) | - |
| unsonsie | 8 | - | - |
| unsicker | 14 | - | - |
| unsights | 12 | - | - |
| unsilent | 8 | - | - |
| unsinews | 11 | - | - |
| unsinful | 11 | - | - |
| ursiform | 13 | - | - |
| utensils | 8 | - | - |
| upsilons | 10 | - | - |
| upsizing | 20 | - | - |
| websites | 13 | - | - |
| weensier | 11 | - | - |
| weakside | 16 | - | - |
| waysides | 15 | - | - |
| whoopsie | 16 | - | - |
| whissing | 15 | - | - |
| whosises | 14 | - | - |
| whatsits | 14 | - | - |
| wellsite | 11 | - | - |
| whimsied | 17 | - | - |
| whimsier | 16 | - | - |
| whimsies | 16 | - | - |
| whimsily | 19 | - | - |
| woopsing | 14 | - | - |
| woodsias | 12 | - | - |
| woodsier | 12 | - | - |
| ypsiloid | 14 | - | - |
| ypsilons | 13 | - | - |
| zoonosis | 17 | an animal disease that can be transmitted to humans | - |
| zoisites | 17 | - | - |
| xeransis | 15 | - | - |
| xerasias | 15 | - | - |
| wussiest | 11 | - | - |
| yersinia | 11 | - | - |
| venosity | 14 | - | - |
| versicle | 13 | a short verse said or sung by a priest or minister in public worship and followed by a response from the congregation | - |
| versines | 11 | - | - |
| versings | 12 | - | - |
| versions | 11 | - | - |
| vesicant | 13 | a chemical agent that causes blistering (especially mustard gas) | - |
| vesicate | 13 | get blistered | - |
| vesicles | 13 | - | - |
| vesicula | 13 | - | - |
| vamosing | 14 | - | - |
| vanessid | 12 | - | - |
| vasiform | 16 | constituting a tube; having hollow tubes (as for the passage of fluids) | - |
| vinosity | 14 | - | - |
| visitant | 11 | someone who visits | - |
| visitees | 11 | - | - |
| visiters | 11 | - | - |
| visitors | 11 | - | - |
| visioner | 11 | - | - |
| visioned | 12 | - | - |
| visibles | 13 | - | - |
| visieing | 12 | - | - |
| visional | 11 | - | - |
| virtuosi | 11 | - | - |
| zygosity | 24 | - | - |
| stokesia | 12 | one species: stokes' aster | - |
| sudsiest | 9 | - | - |
| subbasin | 12 | - | - |
| suasible | 10 | being susceptible to persuasion | - |
| suasions | 8 | - | - |
| subsided | 12 | - | - |
| subsider | 11 | - | - |
| subsides | 11 | - | - |
| subsists | 10 | - | - |
| subsites | 10 | - | - |
| subsizar | 19 | - | - |
| surfside | 12 | - | - |
| taleysim | 13 | - | - |
| tallisim | 10 | - | - |
| swissing | 12 | - | - |
| syssitia | 11 | - | - |
| synapsid | 14 | extinct reptile having a single pair of lateral temporal openings in the skull | - |
| symposia | 15 | - | - |
| syndesis | 12 | - | - |
| teasings | 9 | - | - |
| teensier | 8 | - | - |
| teniasis | 8 | - | - |
| tarsiers | 8 | - | - |
| tarsioid | 9 | - | - |
| tarsiped | 11 | - | - |
| thlipsis | 13 | - | - |
| tersions | 8 | - | - |
| tensions | 8 | - | - |
| tensibly | 13 | - | - |
| tensible | 10 | - | - |
| teosinte | 8 | - | - |
| tipsiest | 10 | - | - |
| thylosis | 14 | - | - |
| thymosin | 16 | hormone secreted by the thymus; stimulates immunological activity of lymphoid tissue | - |
| towsiest | 11 | - | - |
| transire | 8 | - | - |
| transits | 8 | - | - |
| topsider | 11 | - | - |
| topsides | 11 | - | - |
| torsions | 8 | - | - |
| torosity | 11 | - | - |
| tonsilar | 8 | - | - |
| tootsies | 8 | - | - |
| tootsing | 9 | - | - |
| tousiest | 8 | - | - |
| tousings | 9 | - | - |
| tossiest | 8 | - | - |
| tossings | 9 | - | - |
| tressier | 8 | - | - |
| tressing | 9 | - | - |
| tribasic | 12 | - | - |
| tussises | 8 | - | - |
| tylosins | 11 | - | - |
| tsiganes | 9 | - | - |
| tsitsith | 11 | - | - |
| trussing | 9 | - | - |
| trypsins | 13 | - | - |
| uncasing | 11 | - | - |
| tyrosine | 11 | an amino acid found in most proteins; a precursor of several hormones | - |
| uneasier | 8 | - | - |
| spousing | 11 | - | - |
| sponsing | 11 | - | - |
| sponsion | 10 | - | - |
| steapsin | 10 | - | - |
| stasimon | 10 | - | - |
| rimosity | 13 | - | - |
| rinsings | 9 | - | - |
| rinsible | 10 | - | - |
| risibles | 10 | - | - |
| reversis | 11 | - | - |
| revisits | 11 | - | - |
| rosiness | 8 | a healthy reddish complexion | - |
| rosining | 9 | - | - |
| rosinols | 8 | - | - |
| rosinous | 8 | - | - |
| rositing | 9 | - | - |
| rugosity | 12 | - | - |
| rosiners | 8 | - | - |
| rootsier | 8 | - | - |
| rosieres | 8 | - | - |
| rosinate | 8 | - | - |
| salsilla | 8 | tropical vine having umbels of small purple flowers and edible roots sometimes boiled as a potato substitute; Colombia | - |
| sanyasis | 11 | - | - |
| sannyasi | 11 | a Hindu religious mendicant | - |
| scansion | 10 | analysis of verse into metrical patterns | - |
| sarrasin | 8 | - | - |
| sassiest | 8 | - | - |
| sculpsit | 12 | - | - |
| scissile | 10 | - | - |
| scissils | 10 | - | - |
| scission | 10 | the act of dividing by cutting or splitting | - |
| scorsing | 11 | - | - |
| sensings | 9 | - | - |
| sensisms | 10 | - | - |
| sensists | 8 | - | - |
| sensilla | 8 | - | - |
| semiosis | 10 | - | - |
| serosity | 11 | - | - |
| seasides | 9 | - | - |
| seisings | 9 | - | - |
| shipside | 14 | the part of a wharf that is next to a ship | - |
| shamosim | 15 | - | - |
| sidelock | 15 | - | - |
| sidesmen | 11 | - | - |
| sidespin | 11 | - | - |
| sidewall | 12 | a wall that forms the side of a structure | - |
| sidewise | 12 | toward one side | a figure moving sidewise in the shadows |
| sidesman | 11 | (Church of England) an assistant to the churchwarden; collects offerings of money in the church | - |
| sideslip | 11 | an unexpected slide | - |
| sidenote | 9 | - | - |
| sidepath | 14 | - | - |
| siderate | 9 | - | - |
| sidereal | 9 | (of divisions of time) determined by daily motion of the stars | sidereal time |
| siderite | 9 | iron ore in the form of ferrous carbonate | - |
| sideroad | 10 | - | - |
| sienites | 8 | - | - |
| sierozem | 19 | - | - |
| sieverts | 11 | - | - |
| sigisbei | 11 | - | - |
| sigisbeo | 11 | - | - |
| sigmated | 12 | - | - |
| sigmates | 11 | - | - |
| sigmatic | 13 | - | - |
| sigmoids | 12 | - | - |
| signable | 11 | - | - |
| signages | 10 | - | - |
| sightsaw | 15 | - | - |
| siffleur | 14 | - | - |
| siffling | 15 | - | - |
| siftings | 12 | - | - |
| siganids | 10 | - | - |
| sighless | 12 | - | - |
| sighlike | 16 | - | - |
| sighters | 12 | - | - |
| sideling | 10 | - | - |
| siamezes | 19 | - | - |
| sibilant | 10 | of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then') | - |
| sibilate | 10 | make a sharp hissing sound, as if to show disapproval | - |
| sibilous | 10 | - | - |
| siblings | 11 | - | - |
| sibships | 15 | - | - |
| sibyllic | 15 | resembling or characteristic of a prophet or prophecy | - |
| sichting | 14 | - | - |
| siamezed | 20 | - | - |
| siameses | 10 | - | - |
| sialidan | 9 | - | - |
| siamangs | 11 | - | - |
| siamesed | 11 | - | - |
| sickbays | 19 | - | - |
| sickbeds | 17 | - | - |
| sickened | 15 | - | - |
| sidalcea | 11 | genus of showy plants of western North America having palmate leaves and variously colored racemose flowers | - |
| siddurim | 12 | - | - |
| sidearms | 11 | - | - |
| sideband | 12 | - | - |
| sidebars | 11 | - | - |
| sidecars | 11 | - | - |
| sidehill | 12 | - | - |
| sickouts | 14 | - | - |
| sickener | 14 | - | - |
| sickerly | 17 | - | - |
| sicklier | 14 | - | - |
| sicklies | 14 | - | - |
| sicklily | 17 | - | - |
| sickling | 15 | - | - |
| sillibub | 12 | - | - |
| silvered | 12 | - | - |
| silverer | 11 | - | - |
| silverly | 14 | - | - |
| silvexes | 18 | - | - |
| silvical | 13 | - | - |
| simarres | 10 | - | - |
| simaruba | 12 | - | - |
| simazine | 19 | a herbicide used to control weeds (especially among crops) | - |
| silvatic | 13 | - | - |
| siluroid | 9 | - | - |
| silliest | 8 | - | - |
| sillocks | 14 | - | - |
| siloxane | 15 | any of a large class of compounds that have alternate silicon and oxygen atoms | - |
| silphium | 15 | tall North American perennial herbs | - |
| siltiest | 8 | - | - |
| silurian | 8 | from 425 million to 405 million years ago; first air-breathing animals | - |
| silurids | 9 | - | - |
| silurist | 8 | - | - |
| similise | 10 | - | - |
| similize | 19 | - | - |
| similors | 10 | - | - |
| simpkins | 16 | - | - |
| simplers | 12 | - | - |
| simplest | 12 | - | - |
| simpling | 13 | - | - |
| simplism | 14 | a simplification that goes too far (to the point of misrepresentation) | - |
| simplist | 12 | - | - |
| simulant | 10 | - | - |
| simperer | 12 | a smiler whose smile is silly and self-conscious and sometimes coy | - |
| simpered | 13 | - | - |
| simitars | 10 | - | - |
| simmered | 13 | - | - |
| simoniac | 12 | - | - |
| simonies | 10 | - | - |
| simonise | 10 | polish with wax | - |
| simonist | 10 | - | - |
| simulars | 10 | - | - |
| silladar | 9 | - | - |
| signaler | 9 | someone who communicates by signals | - |
| signoria | 9 | - | - |
| silaging | 10 | - | - |
| silastic | 10 | - | - |
| silences | 10 | - | - |
