jousting armor vs American spelling

jousting armor and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
jousting armor	Yes	No	No	No
American spelling	Yes	No	No	No

jousting armor (noun)	American spelling (noun)
a heavy plate armor not intended for free combat, produced in the late 15th to 16th century.	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')