fish vs fish scale

fish and fish scale both are nouns.

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

fish (noun)	fish scale (noun)
any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills	scale of the kind that covers the bodies of fish
the flesh of fish used as food

fish (verb)	fish scale (verb)
catch or try to catch fish or shellfish
seek indirectly