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