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