Cygnus buccinator vs trumpeter swan

Cygnus buccinator and trumpeter swan both are nouns.

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

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

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

Other synonyms of Cygnus buccinator include trumpeter.

Cygnus buccinator (noun)	trumpeter swan (noun)
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