channel cat vs channel catfish

channel cat and channel catfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
channel cat	Yes	No	No	No
channel catfish	Yes	No	No	No

As nouns, channel cat and channel catfish are synonyms defined as:

channel cat and channel catfish: freshwater food fish common throughout central United States

Other synonyms of channel cat include Ictalurus punctatus.

channel cat (noun)	channel catfish (noun)
freshwater food fish common throughout central United States	freshwater food fish common throughout central United States