largemouth black bass vs largemouth

largemouth black bass and largemouth both are nouns.

Word	Noun	Adjective	Verb	Adverb
largemouth black bass	Yes	No	No	No
largemouth	Yes	No	No	No

As nouns, largemouth black bass and largemouth are synonyms defined as:

largemouth black bass and largemouth: a large black bass; the angle of the jaw falls behind the eye

Other synonyms of largemouth black bass include largemouth bass, largemouthed bass, largemouthed black bass, Micropterus salmoides.

largemouth black bass (noun)	largemouth (noun)
a large black bass; the angle of the jaw falls behind the eye	a large black bass; the angle of the jaw falls behind the eye