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