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