Here's what rhymes with quantiiy.
by my high why die lie thy y buy guy tie vi hi shy sigh bi bye chi dye fi hy nigh pi pie thai thigh vie dei ly psi quae rye ty wir awry hai lye mai muy nai wry cy fy kai lai luy mei sy tai thei wai phi dry try cry fly sky deny rely defy spy fry ply quantify sly underlie pry tri trie belie pri sty deify stye turfy slier apply reply imply nearby whereby hereby modify notify amplify decry pupae termini untie amoebae edify aquae bonsai retry spry triply amebae lanai ripply banzais dandify supply thereby justify occupy comply nuclei qualify alkali certify goodbye gratify alibi fortify nullify pacify ratify samurai standby beautify terrify typify codify descry mollify mortify overlie ramify vilify mystify ossify ultrahigh vivify blowfly stupefy scurfy barfly mummify prettify shanghai beatify drachmai gentrify speechify overbuy yuppify identify satisfy multiply specify classify signify simplify testify verify butterfly glorify purify alveoli magnify rectify unify falsify lullaby dignify liquefy resupply acidify demystify firefly stultify calcify horrify misapply petrify reunify cumuli liquify overfly versify vitrify stimuli clarify exemplify intensify diversify indemnify solidify crucify personify preoccupy stratify emulsify reclassify revivify scarify hyperbolae refortify syllabify disqualify objectify oversimplify oversupply detoxify dragonfly electrify dissatisfy declassify solemnify misidentify transmogrify