meter vs American spelling

meter and American spelling both are nouns.

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

meter (noun)	American spelling (noun)
any of various measuring instruments for measuring a quantity	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
rhythm as given by division into parts of equal duration
(prosody) the accent in a metrical foot of verse
the basic unit of length adopted under the Systeme International d'Unites (approximately 1.094 yards)

meter (verb)	American spelling (verb)
measure with a meter
stamp with a meter indicating the postage