whooper vs whooper swan

whooper and whooper swan both are nouns.

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

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

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

Other synonyms of whooper include Cygnus cygnus.

whooper (noun)	whooper swan (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