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