Here's what rhymes with upbye.
by die buy 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 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 supply cry fly sky deny defy fry goodbye sly alibi belie pupae amoebae aquae spry turfy slier reply thereby imply nearby occupy rely whereby comply hereby modify certify underlie ratify standby decry lullaby typify edify bonsai deify ossify retry triply stupefy lanai shanghai ripply banzais overbuy yuppify justify satisfy multiply alkali testify butterfly gratify notify amplify nullify pacify samurai beautify termini terrify codify descry mollify overlie ramify resupply acidify ultrahigh blowfly misapply petrify scurfy barfly mummify prettify beatify drachmai speechify dandify identify nuclei qualify specify classify verify purify quantify fortify magnify rectify unify solidify dignify mortify objectify oversupply vilify firefly mystify stratify stultify vivify calcify horrify overfly versify hyperbolae vitrify gentrify syllabify stimuli clarify signify simplify glorify alveoli diversify falsify crucify liquefy personify demystify detoxify preoccupy emulsify reunify dissatisfy liquify scarify refortify intensify indemnify dragonfly electrify reclassify revivify cumuli declassify solemnify exemplify disqualify misidentify oversimplify transmogrify