checkerboard vs American spelling

checkerboard and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
checkerboard	Yes	No	No	No
American spelling	Yes	No	No	No

checkerboard (noun)	American spelling (noun)
a board having 64 squares of two alternating colors	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')