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