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