Pernicious

adjective

pər'nɪʃəs

Adjective

working or spreading in a hidden and usually injurious way
Similar:Insidious Subtle
exceedingly harmful
Similar:BanefulDeadlyPestilent

Dictionary Validity

Tournament Word List (TWL): SCRABBLE US
Collins Scrabble Words (CSW21): SCRABBLE UK
ENABLE Dictionary: WORDS WITH FRIENDS
Combined US/UK Scrabble Dictionary: SOWPODS
North American Scrabble (NWL2020): NASPA

Similar Words

Insidious
Subtle
Baneful
Deadly
Pestilent
Harmful
Noxious
Perniciousness

More 10-letter words Words starting with P