teleost fish vs teleost

teleost fish and teleost both are nouns.

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

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

Other synonyms of teleost fish include teleostan.

teleost fish (noun)	teleost (noun)
a bony fish of the subclass Teleostei	a bony fish of the subclass Teleostei