whooper vs Cygnus cygnus

whooper and Cygnus cygnus both are nouns.

Word	Noun	Adjective	Verb	Adverb
whooper	Yes	No	No	No
Cygnus cygnus	Yes	No	No	No

As nouns, whooper and Cygnus cygnus are synonyms defined as:

whooper and Cygnus cygnus: common Old World swan noted for its whooping call

Other synonyms of whooper include whooper swan.

whooper (noun)	Cygnus cygnus (noun)
common Old World swan noted for its whooping call	common Old World swan noted for its whooping call
rare North American crane having black-and-white plumage and a trumpeting call