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