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