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