Vaporescent
Evaporative, vaporescent, eruptive, unstable, vaporous, explosive, inflammable, and labile.
Uneasy
Tense, fraught, uncomfortable, explosive, inflammatory, in turmoil, hairy, white-knuckle, strained, uneasy, charged, eruptive, turbulent, full of upheavals, nail-biting, and dodgy.
Inconsistent
Unpredictable, variable, inconsistent, erratic, unstable, unsteady, unreliable, changing, varying, fluctuating, mutable, fitful, full of ups and downs, capricious, fickle, giddy, wayward, highly strung, emotional, fiery, choleric, tempestuous, blowing hot and cold, labile, changeful, changeable, inconstant, uncertain, irregular, turbulent, unsettled, undependable, ever-changing, shifting, fluid, protean, wavering, mercurial, whimsical, flighty, impulsive, temperamental, excitable, overemotional, moody, stormy, volcanic, peaky, and fluctuant.