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