trumpeter vs trumpeter swan

trumpeter and trumpeter swan both are nouns.

Word	Noun	Adjective	Verb	Adverb
trumpeter	Yes	No	No	No
trumpeter swan	Yes	No	No	No

As nouns, trumpeter and trumpeter swan are synonyms defined as:

trumpeter and trumpeter swan: large pure white wild swan of western North America having a sonorous cry

Other synonyms of trumpeter include Cygnus buccinator.

trumpeter (noun)	trumpeter swan (noun)
large gregarious crane-like bird of the forests of South America having glossy black plumage and a loud prolonged cry; easily domesticated	large pure white wild swan of western North America having a sonorous cry
large pure white wild swan of western North America having a sonorous cry
a musician who plays the trumpet or cornet
(formal) a person who announces important news