American spelling vs biological defense

American spelling and biological defense both are nouns.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
biological defense	Yes	No	No	No

American spelling (noun)	biological defense (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	procedures involved in taking defensive measures against attacks using biological agents