fillet vs headband

fillet and headband both are nouns.

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

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

fillet (noun)	headband (noun)
a narrow headband or strip of ribbon worn as a headband	a band worn around or over the head
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)	headband (verb)
cut into filets
decorate with a lace of geometric designs