American spelling vs orthopedic

American spelling is a noun but orthopedic is not a noun.

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

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

American spelling (adjective)	orthopedic (adjective)
	of or relating to orthopedics