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