demineralization vs American spelling

demineralization and American spelling both are nouns.

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

demineralization (noun)	American spelling (noun)
the removal of minerals and mineral salts from a liquid (especially from water)	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
abnormal loss of mineral salts (especially from bone)