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