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