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