sepulcher vs American spelling

sepulcher and American spelling both are nouns.

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

sepulcher (noun)	American spelling (noun)
a chamber that is used as a grave	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')