checker vs American English

checker and American English both are nouns.

Word	Noun	Adjective	Verb	Adverb
checker	Yes	No	Yes	No
American English	Yes	No	No	No

checker (noun)	American English (noun)
one of the flat round pieces used in playing the game of checkers	the English language as used in the United States
one who checks the correctness of something
an attendant who checks coats or baggage

checker (verb)	American English (verb)
variegate with different colors, shades, or patterns
mark into squares or draw squares on; draw crossed lines on