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