fillet vs fish fillet

fillet and fish fillet both are nouns.

Word	Noun	Adjective	Verb	Adverb
fillet	Yes	No	Yes	No
fish fillet	Yes	No	No	No

As nouns, fillet and fish fillet are synonyms defined as:

Other synonyms of fillet include filet, fish filet.

fillet (noun)	fish fillet (noun)
a narrow headband or strip of ribbon worn as a headband	a longitudinal slice or boned side of a fish
fastener consisting of a narrow strip of welded metal used to join steel members
lace having a square mesh
a bundle of sensory nerve fibers going to the thalamus
a boneless steak cut from the tenderloin of beef
a longitudinal slice or boned side of a fish

fillet (verb)	fish fillet (verb)
cut into filets
decorate with a lace of geometric designs