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