mockingbird vs mocker

mockingbird and mocker both are nouns.

Word	Noun	Adjective	Verb	Adverb
mockingbird	Yes	No	No	No
mocker	Yes	No	No	No

As nouns, mockingbird and mocker are synonyms defined as:

mockingbird and mocker: long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds

Other synonyms of mockingbird include Mimus polyglotktos.

mockingbird (noun)	mocker (noun)
long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds	long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds
	someone who jeers or mocks or treats something with contempt or calls out in derision