n. 25B6; adjective
a volatile personality : UNPREDICTABLE, changeable, variable, inconstant, inconsistent, erratic, irregular, unstable, turbulent, blowing hot and cold, varying, shifting, fluctuating, fluid, mutable; mercurial, capricious, whimsical, fickle, flighty, impulsive, temperamental, highly strung, excitable, emotional, fiery, moody, tempestuous.
the atmosphere is too volatile for an election : TENSE, strained, fraught, uneasy, uncomfortable, charged, explosive, inflammatory, turbulent; informal nail-biting; Brit. informal dodgy.
a volatile organic compound : EVAPORATIVE, vaporous; explosive, inflammable; unstable, labile.
stable, calm.