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