filet mignon vs fillet

filet mignon and fillet both are nouns.

Word	Noun	Adjective	Verb	Adverb
filet mignon	Yes	No	No	No
fillet	Yes	No	Yes	No

As nouns, fillet is a hypernym of filet mignon; that is, fillet is a word with a broader meaning than filet mignon:

Other hypernyms of filet mignon include filet.

filet mignon (noun)	fillet (noun)
small steak cut from the thick end of a beef tenderloin	a narrow headband or strip of ribbon worn as a headband
	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

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