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