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