Yank vs Yankee-Doodle

Yank and Yankee-Doodle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Yank	Yes	No	No	No
Yankee-Doodle	Yes	No	No	No

As nouns, Yank and Yankee-Doodle are synonyms defined as:

Other synonyms of Yank include Yankee.

Yank (noun)	Yankee-Doodle (noun)
an American (especially to non-Americans)	an American (especially to non-Americans)
an American who lives in the North (especially during the American Civil War)