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