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