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