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