Here's what rhymes with briefly.
Words that almost rhyme with briefly
irony piety privacy primacy pliancy finally variety privately rivalry piracy sobriety vitally mightily rightfully piously righteously simony tidily tidally viably pliantly torridity society anxiety quietly dynasty propriety notoriety reliably delightfully frightfully finitely spirally lifelessly stridency podiatry decidedly silently psychiatry skilfully defiantly malignity tirelessly advisedly resignedly spitefully stridently unitedly vaginally vibrancy desirably mindfully timelessly guilelessly insobriety advisably excitedly impropriety undeniably contrariety impiously mindlessly certifiably compliantly lopsidedly unreliably excitably spinelessly asininely justifiably unadvisedly undesirably unskilfully indefinably misguidedly recognizably indescribably unjustifiably irreconcilably