glycerin vs American spelling

glycerin and American spelling both are nouns.

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

glycerin (noun)	American spelling (noun)
a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')