useable vs American spelling

useable is not a noun while American spelling is a noun.

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

useable (noun)	American spelling (noun)
	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

useable (adjective)	American spelling (adjective)
convenient for use or disposal
fit or ready for use or service
capable of being put to use