mail vs American English

mail and American English both are nouns.

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

mail (noun)	American English (noun)
(Middle Ages) flexible armor made of interlinked metal rings	the English language as used in the United States
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

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