American spelling vs diarrhea

American spelling and diarrhea both are nouns.

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

American spelling (noun)	diarrhea (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor