fiber vs American spelling

fiber and American spelling both are nouns.

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

fiber (noun)	American spelling (noun)
a leatherlike material made by compressing layers of paper or cloth	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
the inherent complex of attributes that determines a persons moral and ethical actions and reactions
any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)
coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis
a slender and greatly elongated substance capable of being spun into yarn