tail fin vs fish

tail fin and fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
tail fin	Yes	No	No	No
fish	Yes	No	Yes	No

tail fin (noun)	fish (noun)
the tail of fishes and some other aquatic vertebrates	any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills
a stabilizer that is part of the vertical tail structure of an airplane	the flesh of fish used as food
one of a pair of decorations projecting above the rear fenders of an automobile

tail fin (verb)	fish (verb)
	catch or try to catch fish or shellfish
	seek indirectly