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