American spelling vs fetus

American spelling and fetus both are nouns.

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

American spelling (noun)	fetus (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal