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