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