whooping crane vs whooper

whooping crane and whooper both are nouns.

Word	Noun	Adjective	Verb	Adverb
whooping crane	Yes	No	No	No
whooper	Yes	No	No	No

As nouns, whooping crane and whooper are synonyms defined as:

whooping crane and whooper: rare North American crane having black-and-white plumage and a trumpeting call

Other synonyms of whooping crane include Grus americana.

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