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