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