Synonyms of volatile in English:

volatile


See definition of volatile

adjective

1‘her sister was headstrong and volatile’

SYNONYMS
unpredictable, changeable, variable, inconstant, inconsistent, uncertain, erratic, irregular, unstable, turbulent, unsteady, unsettled, unreliable, undependable, changing, ever-changing, varying, shifting, fluctuating, fluid, mutable, protean, fitful, wavering, full of ups and downs
mercurial, capricious, whimsical, fickle, flighty, giddy, impulsive, wayward, temperamental, highly strung, excitable, emotional, overemotional, fiery, moody, choleric, stormy, tempestuous, volcanic
informal blowing hot and cold, peaky
technical labile
rare fluctuant, changeful
ANTONYMS

stable, constant

2‘the atmosphere in the capital seems far too volatile for any talk of elections’

SYNONYMS
tense, strained, fraught, uneasy, uncomfortable, charged, explosive, eruptive, inflammatory, turbulent, in turmoil, full of upheavals
informal hairy, nail-biting, white-knuckle
British informal dodgy
ANTONYMS

stable, calm

3‘a plume of pollution caused by a volatile organic compound’

SYNONYMS
evaporative, vaporous, vaporescent
explosive, eruptive, inflammable
unstable
technical labile