American spelling vs capsulize

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

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

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

American spelling (verb)	capsulize (verb)
	put in a short or concise form; reduce in volume
	enclose in a capsule