11-letter words ending with S
Dive into the specific realm of 11-letter words that conclude with the letter S. This focused section reveals the fascinating ways in which words of this particular length, ending with S, contribute to the richness of the English language. Whether it's for expanding your vocabulary, solving puzzles, or simply for the love of words, discover how these terms uniquely blend length and ending sound.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| authorities | 14 | the organization that is the governing authority of a political unit | the matter was referred to higher authorities |
| forgiveness | 18 | the act of excusing a mistake or offense | - |
| unconscious | 15 | that part of the mind wherein psychic activity takes place of which the person is unaware | - |
| meaningless | 14 | having no meaning or direction or purpose | a meaningless endeavor |
| whereabouts | 19 | the general location where something is | I questioned him about his whereabouts on the night of the crime |
| coordinates | 14 | - | - |
| compliments | 19 | (usually plural) a polite expression of desire for someone's welfare | - |
| butterflies | 16 | - | - |
| mathematics | 20 | a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement | - |
| spontaneous | 13 | happening or arising without apparent external cause | spontaneous laughter |
| foolishness | 17 | the trait of acting stupidly or rashly | - |
| nonetheless | 14 | despite anything to the contrary (usually preceding a concession) | - |
| mischievous | 21 | naughtily or annoyingly playful | - |
| electronics | 15 | the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices | - |
| philippines | 20 | an archipelago in the southwestern Pacific including some 7000 islands | - |
| proceedings | 17 | (law) the institution of a sequence of steps by which legal judgments are invoked | - |
| descendants | 15 | all of the offspring of a given progenitor | - |
| treacherous | 16 | tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans | the fiercest and most treacherous of foes |
| discoveries | 17 | - | - |
| pretentious | 13 | intended to attract notice and impress others | - |
| formalities | 16 | a requirement of etiquette or custom | - |
| mercenaries | 15 | - | - |
| prestigious | 14 | having an illustrious reputation; respected | a prestigious author |
| credentials | 14 | a document attesting to the truth of certain stated facts | - |
| defenseless | 15 | having no protecting or concealing cover | - |
| adventurous | 15 | willing to undertake or seeking out new and daring enterprises | adventurous pioneers |
| nothingness | 15 | empty rhetoric or insincere or exaggerated talk | - |
| corrections | 15 | the department of local government that is responsible for managing the treatment of convicted offenders | for a career in corrections turn to the web site of the New Jersey Department of Corrections |
| unhappiness | 18 | emotions experienced when not in a state of well-being | - |
| seriousness | 11 | the trait of being serious | a lack of solemnity is not necessarily a lack of seriousness |
| selfishness | 17 | stinginess resulting from a concern for your own welfare and a disregard of others | - |
| illustrious | 11 | widely known and esteemed | an illustrious judge |
| conspicuous | 17 | without any attempt at concealment; completely obvious | - |
| willingness | 15 | cheerful compliance | he expressed his willingness to help |
| cleanliness | 13 | diligence in keeping clean | - |
| thoughtless | 18 | without care or thought for others | the thoughtless saying of a great princess on being informed that the people had no bread; `Let them eat cake' |
| promiscuous | 17 | casual and unrestrained in sexual behavior | - |
| hemorrhoids | 20 | - | - |
| carnivorous | 16 | (used of plants as well as animals) feeding on animals | carnivorous plants are capable of trapping and digesting small animals especially insects |
| defenceless | 17 | without defense | - |
| antiquities | 20 | - | - |
| drunkenness | 16 | the act of drinking alcoholic beverages to excess | - |
| smithereens | 16 | a collection of small fragments considered as a whole | Berlin was bombed to smithereens |
| superfluous | 16 | serving no useful purpose; having no excuse for being | - |
| blasphemous | 20 | grossly irreverent toward what is held to be sacred | blasphemous rites of a witches' Sabbath |
| demolitions | 14 | - | - |
| scrumptious | 17 | extremely pleasing to the sense of taste | - |
| sarcophagus | 19 | a stone coffin (usually bearing sculpture or inscriptions) | - |
| adversaries | 15 | - | - |
| intravenous | 14 | within or by means of a vein | an intravenous inflammation |
| magnanimous | 16 | generous and understanding and tolerant | magnanimous toward his enemies |
| shepherdess | 20 | a woman shepherd | - |
| flirtatious | 14 | like a coquette | - |
| strangeness | 12 | unusualness as a consequence of not being well known | - |
| triceratops | 15 | huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill | - |
| dignitaries | 13 | - | - |
| hostilities | 14 | fighting; acts of overt warfare | the outbreak of hostilities |
| mountainous | 13 | having hills and crags | - |
| nervousness | 14 | an uneasy psychological state | - |
| industrious | 12 | characterized by hard work and perseverance | - |
| diagnostics | 15 | the branch of medical science dealing with the classification of disease | - |
| metaphysics | 23 | the philosophical study of being and knowing | - |
| furnishings | 18 | - | - |
| telekinesis | 15 | the power to move something by thinking about it without the application of physical force | - |
| aeronautics | 13 | the theory and practice of navigation through air or space | - |
| lawlessness | 14 | a state of lawlessness and disorder (usually resulting from a failure of government) | - |
| correctness | 15 | conformity to fact or truth | - |
| awkwardness | 22 | unskillfulness resulting from a lack of training | - |
| contentious | 13 | inclined or showing an inclination to dispute or disagree, even to engage in law suits | a style described as abrasive and contentious |
| enchantress | 16 | a woman who is considered to be dangerously seductive | - |
| liabilities | 13 | anything that is owed to someone else | - |
| unrighteous | 15 | not righteous | an unrighteous man |
| efficacious | 21 | producing or capable of producing an intended result or having a striking effect | an efficacious law |
| linguistics | 14 | the humanistic study of language and literature | - |
| visionaries | 14 | - | - |
| hippocampus | 24 | seahorses | - |
| thereabouts | 16 | near that place | he stayed in London or thereabouts for several weeks |
| phosphorous | 21 | containing or characteristic of phosphorus | - |
| overzealous | 23 | marked by excessive enthusiasm for and intense devotion to a cause or idea | - |
| greenhouses | 15 | - | - |
| cunnilingus | 14 | oral stimulation of the vulva or clitoris | - |
| lighthouses | 18 | - | - |
| naughtiness | 15 | an attribute of mischievous children | - |
| whorehouses | 20 | - | - |
| extractions | 20 | - | - |
| sanctuaries | 13 | - | - |
| ignominious | 14 | (used of conduct or character) deserving or bringing disgrace or shame | an ignominious retreat |
| sweepstakes | 20 | a lottery in which the prize consists of the money paid by the participants | - |
| capillaries | 15 | - | - |
| hydroponics | 22 | a technique of growing plants (without soil) in water containing dissolved nutrients | - |
| synchronous | 19 | occurring or existing at the same time or having the same period or phase | recovery was synchronous with therapy |
| awesomeness | 16 | - | - |
| parenthesis | 16 | a message that departs from the main subject | - |
| peritonitis | 13 | inflammation of the peritoneum | - |
| playfulness | 19 | activities that are enjoyable or amusing | - |
| prosthetics | 18 | the branch of medicine dealing with the production and use of artificial body parts | - |
| seasickness | 17 | motion sickness experienced while traveling on water | - |
| precipitous | 17 | done with very great haste and without due deliberation | - |
| tonsillitis | 11 | inflammation of the tonsils (especially the palatine tonsils) | - |
| specialness | 15 | the quality of being particular and pertaining to a specific case or instance | - |
| itineraries | 11 | - | - |
| legionaries | 12 | - | - |
| unambiguous | 16 | admitting of no doubt or misunderstanding; having only one meaning or interpretation and leading to only one conclusion | - |
| emotionless | 13 | unmoved by feeling | he kept his emotionless objectivity and faith in the cause he served |
| orthopedics | 19 | the branch of medical science concerned with disorders or deformities of the spine and joints | - |
| meritorious | 13 | deserving reward or praise | a lifetime of meritorious service |
| incongruous | 14 | lacking in harmony or compatibility or appropriateness | a plan incongruous with reason |
| duplicitous | 16 | marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another | - |
| millenniums | 15 | - | - |
| remorseless | 13 | without mercy or pity | a monster of remorseless cruelty |
| histrionics | 16 | a performance of a play | - |
| necessaries | 13 | - | - |
| homeostasis | 16 | (physiology) metabolic equilibrium actively maintained by several complex biological mechanisms that operate via the autonomic nervous system to offset disrupting changes | - |
| incredulous | 14 | not disposed or willing to believe; unbelieving | - |
| sweetbreads | 17 | edible glands of an animal | - |
| tempestuous | 15 | characterized by violent emotions or behavior | - |
| uselessness | 11 | the quality of having no practical use | - |
| antecedents | 14 | - | - |
| auditoriums | 14 | - | - |
| ceremonious | 15 | rigidly formal or bound by convention | their ceremonious greetings did not seem heartfelt |
| androgynous | 16 | having both male and female characteristics | - |
| passionless | 13 | unmoved by feeling | this passionless girl was like an icicle in the sunshine |
| purposeless | 15 | serving no useful purpose; having no excuse for being | a life essentially purposeless |
| repetitious | 13 | characterized by repetition | - |
| homogeneous | 17 | all of the same or similar kind or nature | a close-knit homogeneous group |
| inventories | 14 | - | - |
| marchioness | 18 | a noblewoman ranking below a duchess and above a countess | - |
| undershorts | 15 | - | - |
| tributaries | 13 | - | - |
| acidophilus | 19 | a bacterium that is used to make yogurt and to supplement probiotics | - |
| contretemps | 17 | an awkward clash | he tried to smooth over his contretemps with the policeman |
| cybernetics | 20 | (biology) the field of science concerned with processes of communication and control (especially the comparison of these processes in biological and artificial systems) | - |
| cunningness | 14 | - | - |
| paediatrics | 16 | the branch of medicine concerned with the treatment of infants and children | - |
| tediousness | 12 | dullness owing to length or slowness | - |
| ultrasonics | 13 | - | - |
| unambitious | 15 | having little desire for success or achievement | - |
| troglodytes | 16 | type genus of the Troglodytidae | - |
| willfulness | 17 | the trait of being prone to disobedience and lack of discipline | - |
| wakefulness | 21 | a temporary state in which you are unable (or unwilling) to sleep | accept your wakefulness and sleep in its own contrary way is more likely to come |
| theirselves | 17 | - | - |
| callousness | 13 | devoid of passion or feeling; hardheartedness | - |
| fantabulous | 16 | very good; of the highest quality | - |
| courthouses | 16 | - | - |
| narcissuses | 13 | - | - |
| punctilious | 15 | marked by precise accordance with details | punctilious in his attention to rules of etiquette |
| prostatitis | 13 | inflammation of the prostate gland characterized by perineal pain and irregular urination and (if severe) chills and fever | - |
| shallowness | 17 | lack of depth of knowledge or thought or feeling | - |
| sexlessness | 18 | having no evident sex or sex organs | - |
| houselights | 18 | lights that illuminate the audience's part of a theater or other auditorium | - |
| ignoramuses | 14 | - | - |
| industrials | 12 | - | - |
| viciousness | 16 | the trait of extreme cruelty | - |
| theatricals | 16 | - | - |
| archduchess | 22 | a wife or widow of an archduke or a princess of the former ruling house of Austria | - |
| auxiliaries | 18 | - | - |
| dilettantes | 12 | - | - |
| endlessness | 12 | the property of being (or seeming to be) without end | - |
| featureless | 14 | lacking distinguishing characteristics or features | the featureless landscape of the steppe |
| expeditious | 21 | marked by speed and efficiency | - |
| orderliness | 12 | the quality of appreciating method and system | - |
| pneumonitis | 15 | inflammation of the lungs; caused by a virus or an allergic reaction | - |
| splendorous | 14 | - | - |
| precautious | 15 | - | - |
| healthiness | 17 | the state of being vigorous and free from bodily or mental disease | - |
| geopolitics | 16 | the study of the effects of economic geography on the powers of the state | - |
| godlessness | 13 | impiety by virtue of not being a godly person | - |
| underthings | 16 | - | - |
| vertiginous | 15 | having or causing a whirling sensation; liable to falling | a vertiginous climb up the face of the cliff |
| worldliness | 15 | the quality or character of being intellectually sophisticated and worldly through cultivation or experience or disillusionment | - |
| anxiousness | 18 | a feeling of mild anxiety about possible developments | - |
| blessedness | 14 | a state of supreme happiness | - |
| boorishness | 16 | inelegance by virtue of being an uncouth boor | - |
| anastomosis | 13 | a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous | - |
| androgenous | 13 | of or related to androgenesis | - |
| anaphylaxis | 26 | hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance | - |
| acrimonious | 15 | marked by strong resentment or cynicism | an acrimonious dispute |
| deleterious | 12 | harmful to living things | deleterious chemical additives |
| delphiniums | 19 | - | - |
| earnestness | 11 | the trait of being serious | - |
| evasiveness | 17 | intentionally vague or ambiguous | - |
| featherless | 17 | having no feathers | a featherless biped |
| fearfulness | 17 | an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight) | - |
| cultureless | 13 | - | - |
| mellifluous | 16 | pleasing to the ear | - |
| miserliness | 13 | total lack of generosity with money | - |
| mindfulness | 17 | the trait of staying aware of (paying close attention to) your responsibilities | - |
| protectress | 15 | - | - |
| pseudomonas | 16 | type genus of the family Pseudomonodaceae | - |
| receivables | 18 | money that you currently expect to receive from notes or accounts | - |
| saintliness | 11 | the quality of resembling a saint | - |
| shrubberies | 18 | - | - |
| steakhouses | 18 | - | - |
| herbivorous | 19 | feeding only on plants | - |
| haughtiness | 18 | overbearing pride evidenced by a superior manner toward inferiors | - |
| hideousness | 15 | dreadful ugliness; horrible repulsiveness | - |
| irreligious | 12 | hostile or indifferent to religion | - |
| janissaries | 18 | - | - |
| unglamorous | 14 | not challenging; dull and lacking excitement | an unglamorous job greasing engines |
| uprightness | 17 | the property of being upright in posture | - |
| widdershins | 19 | - | - |
| tiddlywinks | 23 | a game in which players try to flip plastic disks into a cup by pressing them on the side sharply with a larger disk | - |
| toplessness | 13 | - | - |
| apatosaurus | 13 | huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic | - |
| assuredness | 12 | great coolness and composure under strain | - |
| beastliness | 13 | the quality of being deliberately mean | - |
| blockhouses | 22 | - | - |
| brucellosis | 15 | an infectious disease of domestic animals often resulting in spontaneous abortion; transmittable to human beings | - |
| candidiasis | 15 | an infection caused by fungi of the genus Monilia or Candida (especially Candida albicans) | - |
| champignons | 21 | - | - |
| airsickness | 17 | motion sickness experienced while traveling by air (especially during turbulence) | - |
| deviousness | 15 | the quality of being oblique and rambling indirectly | - |
| forwardness | 18 | prompt willingness | he tried to explain his forwardness in battle |
| corruptness | 15 | lack of integrity or honesty (especially susceptibility to bribery); use of a position of trust for dishonest gain | - |
| crookedness | 18 | the quality of being deceitful and underhanded | - |
| myxomatosis | 25 | a viral disease (usually fatal) of rabbits | - |
| naturalness | 11 | the quality of innocent naivete | - |
| obviousness | 16 | the property of being easy to see and understand | - |
| overanxious | 21 | anxious or nervous to an excessive degree | - |
| peristalsis | 13 | the process of wavelike muscle contractions of the alimentary tract that moves food along | - |
| megalopolis | 16 | a very large urban complex (usually involving several cities and towns) | - |
| sanatoriums | 13 | - | - |
| sanguineous | 12 | confidently optimistic and cheerful | - |
| spondylitis | 17 | inflammation of a spinal joint; characterized by pain and stiffness | - |
| proliferous | 16 | - | - |
| prophylaxis | 28 | the prevention of disease | - |
| guesthouses | 15 | - | - |
| hopefulness | 19 | full of hope | - |
| impresarios | 15 | - | - |
| languidness | 13 | - | - |
| measureless | 13 | without limits in extent or size or quantity | - |
| graphicness | 19 | - | - |
| tendentious | 12 | having or marked by a strong tendency especially a controversial one | a tendentious account of recent elections |
| unawareness | 14 | unconsciousness resulting from lack of knowledge or attention | - |
| unluckiness | 17 | - | - |
| ungodliness | 13 | impiety by virtue of not being a godly person | - |
| unreligious | 12 | - | - |
| thriftiness | 17 | frugality in the expenditure of money or resources | - |
| treacheries | 16 | - | - |
| wistfulness | 17 | a sadly pensive longing | - |
| aplanatisms | 15 | - | - |
| apolaustics | 15 | - | - |
| apologetics | 16 | the branch of theology that is concerned with the defense of Christian doctrines | - |
| apologisers | 14 | - | - |
| apologizers | 23 | - | - |
| apocalypses | 20 | - | - |
| apochromats | 20 | - | - |
| apomorphias | 20 | - | - |
| apostatises | 13 | - | - |
| apostatizes | 22 | - | - |
| apostolates | 13 | - | - |
| aposiopesis | 15 | breaking off in the middle of a sentence (as by writers of realistic conversations) | - |
| aponeuroses | 13 | - | - |
| aponeurosis | 13 | any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons | - |
| apophthegms | 24 | - | - |
| apoplectics | 19 | - | - |
| apoproteins | 15 | - | - |
| aposiopeses | 15 | - | - |
| apishnesses | 16 | - | - |
| antistatics | 13 | - | - |
| antivenenes | 14 | - | - |
| antiviruses | 14 | - | - |
| antitheists | 14 | - | - |
| antistories | 11 | - | - |
| antitheisms | 16 | - | - |
| apertnesses | 13 | - | - |
| aphelandras | 17 | - | - |
| aphidicides | 20 | - | - |
| aphrodisias | 17 | - | - |
| apartnesses | 13 | - | - |
| antsinesses | 11 | - | - |
| anxiolytics | 23 | - | - |
| aparthotels | 16 | - | - |
| apicultures | 15 | - | - |
| apprentices | 17 | - | - |
| appositions | 15 | - | - |
| appositives | 18 | - | - |
| appreciates | 17 | - | - |
| aquafitness | 23 | - | - |
| aquamanales | 22 | - | - |
| aquamaniles | 22 | - | - |
| aquamarines | 22 | - | - |
| aquanautics | 22 | - | - |
| aquaerobics | 24 | - | - |
| approvances | 20 | - | - |
| aprications | 15 | - | - |
| apriorities | 13 | - | - |
| aquaphobias | 27 | - | - |
| apostolises | 13 | - | - |
| apparatuses | 15 | - | - |
| apparencies | 17 | - | - |
| apparitions | 15 | - | - |
| apostolizes | 22 | - | - |
| apostrophes | 18 | - | - |
| apostrophus | 18 | - | - |
| appearances | 17 | - | - |
| appledrains | 16 | - | - |
| applesauces | 17 | - | - |
| applicators | 17 | - | - |
| appetitions | 15 | - | - |
| appendicles | 18 | - | - |
| apperceives | 20 | - | - |
| appetencies | 17 | - | - |
| anthologies | 15 | - | - |
| anthracoses | 16 | - | - |
| anthracosis | 16 | lung disease caused by inhaling coal dust | - |
| anthropoids | 17 | - | - |
| anthracites | 16 | - | - |
| anthomanias | 16 | - | - |
| anthophores | 19 | - | - |
| anthotaxies | 21 | - | - |
| anthracenes | 16 | - | - |
| antibaryons | 16 | - | - |
| antibilious | 13 | - | - |
| antibiotics | 15 | - | - |
| anticlinals | 13 | - | - |
| anticivisms | 18 | - | - |
| antichrists | 16 | - | - |
| anticipants | 15 | - | - |
| anticipates | 15 | - | - |
| antiemetics | 15 | - | - |
| antagonises | 12 | - | - |
| antagonisms | 14 | - | - |
| antagonists | 12 | - | - |
| antagonizes | 21 | - | - |
| antalkalies | 15 | - | - |
| anointments | 13 | - | - |
| anonymities | 16 | - | - |
| anophelines | 16 | - | - |
| anthersmuts | 16 | - | - |
| antepenults | 13 | - | - |
| antecessors | 13 | - | - |
| antechapels | 18 | - | - |
| antiphrases | 16 | - | - |
| antiphrasis | 16 | the use of a word in a sense opposite to its normal sense (especially in irony) | - |
| antipodeans | 14 | - | - |
| antiprotons | 13 | - | - |
| antipyreses | 16 | - | - |
| antipyresis | 16 | medication with antipyretics to treat a fever | - |
| antiphonies | 16 | - | - |
| antiphoners | 16 | - | - |
| antiparties | 13 | - | - |
| antipathies | 16 | - | - |
| antiphonals | 16 | - | - |
| antipyrines | 16 | - | - |
| antiseptics | 15 | - | - |
| antisexists | 18 | - | - |
| antismokers | 17 | - | - |
| antiquaries | 20 | - | - |
| antiqueness | 20 | - | - |
| antiracisms | 15 | - | - |
| antiracists | 13 | - | - |
| antihelices | 16 | - | - |
| antihelixes | 21 | - | - |
| antifungals | 15 | - | - |
| antifreezes | 23 | - | - |
| antileptons | 13 | - | - |
| antimonious | 13 | relating to or derived from antimony | antimonious oxide |
| antimonites | 13 | - | - |
| antinomians | 13 | - | - |
| antimonides | 14 | - | - |
| antimasques | 22 | - | - |
| antimatters | 13 | - | - |
| antimerisms | 15 | - | - |
| antimonates | 13 | - | - |
| antimonials | 13 | - | - |
| asseverates | 14 | - | - |
| assistances | 13 | - | - |
| associators | 13 | - | - |
| assoilments | 13 | - | - |
| assimilates | 13 | - | - |
| assibilates | 13 | - | - |
| assiduities | 12 | - | - |
| assignments | 14 | - | - |
| assortments | 13 | - | - |
| astigmatics | 16 | - | - |
| astrictions | 13 | - | - |
| asthenopias | 16 | - | - |
| assumptions | 15 | - | - |
| assythments | 19 | - | - |
| astaticisms | 15 | - | - |
| asteridians | 12 | - | - |
| aspersories | 13 | - | - |
| asphaltites | 16 | - | - |
| asphyxiants | 26 | - | - |
| aspergillus | 14 | genus of common molds causing food spoilage and some pathogenic to plants and animals | - |
| asepticizes | 24 | - | - |
| ashamedness | 17 | - | - |
| asininities | 11 | - | - |
| askewnesses | 18 | - | - |
| asparagines | 14 | - | - |
| asparaguses | 14 | - | - |
| asphyxiates | 26 | - | - |
| aspidistras | 14 | - | - |
| assentators | 11 | - | - |
| assentients | 11 | - | - |
| assessments | 13 | - | - |
| assemblages | 16 | - | - |
| aspirations | 13 | - | - |
| assafetidas | 15 | - | - |
| assailments | 13 | - | - |
| atrabilious | 13 | irritable as if suffering from indigestion | - |
| attendments | 14 | - | - |
| attenuators | 11 | - | - |
| attendances | 14 | - | - |
| atracuriums | 15 | - | - |
| atramentous | 13 | - | - |
| attachments | 18 | - | - |
| attainments | 13 | - | - |
| attaintures | 11 | - | - |
| attestators | 11 | - | - |
| attirements | 13 | - | - |
| attractions | 13 | - | - |
| attributers | 13 | - | - |
| attributors | 13 | - | - |
| attractants | 13 | - | - |
| attophysics | 21 | - | - |
| attornments | 13 | - | - |
| atonicities | 13 | - | - |
| astronomies | 13 | - | - |
| asymmetries | 18 | - | - |
| astronomers | 13 | - | - |
| astringents | 12 | - | - |
| astroblemes | 15 | - | - |
| astrologers | 12 | - | - |
| astrologies | 12 | - | - |
| asynartetes | 14 | - | - |
| asystolisms | 16 | - | - |
| atmometries | 15 | - | - |
| atmospheres | 18 | - | - |
| atomicities | 15 | - | - |
| atmologists | 14 | - | - |
| atelectases | 13 | - | - |
| atelectasis | 13 | collapse of an expanded lung (especially in infants); also failure of pulmonary alveoli to expand at birth | - |
| atheologies | 15 | - | - |
| athermanous | 16 | - | - |
| atonalities | 11 | - | - |
| asepticisms | 17 | - | - |
| archaeornis | 16 | extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing | - |
| archenemies | 18 | - | - |
| archeresses | 16 | - | - |
| archespores | 18 | - | - |
| archaicisms | 20 | - | - |
| archbishops | 23 | - | - |
| archdeacons | 19 | - | - |
| archduchies | 22 | - | - |
| archiplasms | 20 | - | - |
| arcubalists | 15 | - | - |
| arduousness | 12 | extreme effortfulness | - |
| arefactions | 16 | - | - |
| arenicolous | 13 | growing or living or burrowing in sand | arenicolous worms |
| areolations | 11 | - | - |
| arctophiles | 18 | - | - |
| architraves | 19 | - | - |
| archologies | 17 | - | - |
| archonships | 21 | - | - |
| archontates | 16 | - | - |
| archoplasms | 20 | - | - |
| archpriests | 18 | - | - |
| arctangents | 14 | - | - |
| aquaphobics | 29 | - | - |
| arabilities | 13 | - | - |
| arachnidans | 17 | - | - |
| aquaplaners | 22 | - | - |
| aquatinters | 20 | - | - |
| araeometers | 13 | - | - |
| araeostyles | 14 | - | - |
| arbitrators | 13 | - | - |
| arbitresses | 13 | - | - |
| arboraceous | 15 | abounding in trees | - |
| arborvitaes | 16 | - | - |
| araliaceous | 13 | - | - |
| arbalesters | 13 | - | - |
| arbalisters | 13 | - | - |
| arbitragers | 14 | - | - |
| arboviruses | 16 | - | - |
| arthrodeses | 15 | - | - |
| articulates | 13 | - | - |
| artilleries | 11 | - | - |
| arthrodesis | 15 | the surgical fixation of a joint which is intended to result in bone fusion | - |
| arthromeres | 16 | - | - |
| artlessness | 11 | the quality of innocent naivete | - |
| artsinesses | 11 | - | - |
| aryballoses | 16 | - | - |
| asceticisms | 17 | - | - |
| ascititious | 13 | - | - |
| asclepiases | 15 | - | - |
| ascomycetes | 20 | large class of higher fungi coextensive with division Ascomycota: sac fungi | - |
| ascriptions | 15 | - | - |
| arytaenoids | 15 | - | - |
| asafoetidas | 15 | - | - |
| asarabaccas | 17 | - | - |
| ascendances | 16 | - | - |
| ascendences | 16 | - | - |
| asepticises | 15 | - | - |
| arthritises | 14 | - | - |
| argumentums | 16 | - | - |
| arpeggiates | 15 | - | - |
| arpeggiones | 15 | - | - |
| arragonites | 12 | - | - |
