Here's what rhymes with effecient.
prescient Words that almost rhyme with effecient
variant invariant veriest sexiest cerement hairiest zestiest chariot heaviest recreant lariat pettiest scariest sketchiest cheviot wariest heftiest smelliest dressiest peppiest peskiest sweatiest testiest tetchiest leggiest teariest wealthiest deadliest homeliest lengthiest fleshiest stealthiest fleshliest stretchiest preppiest friendliest comeliest cleanliest commissariat secretariat unfriendliest uncleanliest proletariat