smallmouthed bass vs smallmouth black bass

smallmouthed bass and smallmouth black bass both are nouns.

Word	Noun	Adjective	Verb	Adverb
smallmouthed bass	Yes	No	No	No
smallmouth black bass	Yes	No	No	No

As nouns, smallmouthed bass and smallmouth black bass are synonyms defined as:

smallmouthed bass and smallmouth black bass: a variety of black bass; the angle of the jaw falls below the eye

Other synonyms of smallmouthed bass include Micropterus dolomieu, smallmouth, smallmouth bass, smallmouthed black bass.

smallmouthed bass (noun)	smallmouth black bass (noun)
a variety of black bass; the angle of the jaw falls below the eye	a variety of black bass; the angle of the jaw falls below the eye