mocker vs mockingbird

mocker and mockingbird both are nouns.

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

As nouns, mocker and mockingbird are synonyms defined as:

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

Other synonyms of mocker include Mimus polyglotktos.

mocker (noun)	mockingbird (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