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