Here's what rhymes with efficimus.
Words that almost rhyme with efficimus
dizziness pithiness prissiness serious hideous initiates insidious vitreous invidious pitiless bilious ligneous tibias mysterious affiliates imperious resilience amphibious delirious lineaments incipience experience recipients fastidious lascivious percipience oblivious ignominious supercilious conciliates disaffiliates deleterious inexperience punctilious miscreants consanguineous propitiates