American English vs mail

American English and mail both are nouns.

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

American English (noun)	mail (noun)
the English language as used in the United States	(Middle Ages) flexible armor made of interlinked metal rings
	a conveyance that transports the letters and packages that are conveyed by the postal system
	the system whereby messages are transmitted via the post office
	the bags of letters and packages that are transported by the postal service
	any particular collection of letters or packages that is delivered

American English (verb)	mail (verb)
	cause to be directed or transmitted to another place
	send via the postal service