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