Here's what rhymes with impassive.
passive massive Words that almost rhyme with impassive
passeth basses dashes brasses morasses gasses bashes wrasses jazzes lavish lashes surpasses caches rashes sashes hashish harasses mashes raffish amasses cashes gnashes stashes brazes trashes abashes razzes flashes clashes crashes rapacious slashes smashes overpasses thrashes underpasses demitasses pugnacious hourglasses calabashes gatecrashes adaptive captive inactive interactive expansive combative attractive reactive proactive contrastive nonactive unattractive maladaptive extractive hyperactive overactive counteractive radioactive refractive retroactive vasoactive psychoactive nonreactive immunoreactive putrefactive nonradioactive