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