upward vs American English

upward is not a noun while American English is a noun.

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

upward (noun)	American English (noun)
	the English language as used in the United States

upward (adjective)	American English (adjective)
extending or moving toward a higher place
directed up

upward (adverb)	American English (adverb)
spatially or metaphorically from a lower to a higher position
to a later time