4 letter words rhyming with 'down':
FartDartPartMartHart
Calf, gaff,
Hive Dive Live
bled head shed
One four letter animal that does not rhyme with any words is wolf.
A four-letter animal word that cannot be rhymed is "wolf." Unlike many other four-letter words, "wolf" has a unique ending sound that doesn't have a perfect rhyme in the English language. Other examples of four-letter animals, like "frog" or "bear," have words that rhyme with them, but "wolf" stands out as an exception.
Carp Harp Parp Yurp Nurp Karp
Quit, grit, knit, skit, slit, whit, and writ.
score
bong dong Fong gong Kong long pong song tong
rook
The first four lines of the prologue rhyme the words "dignity", "scene", "mutiny" and "unclean".