American spelling vs scrutinize

American spelling is a noun but scrutinize is not a noun.

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

American spelling (noun)	scrutinize (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

American spelling (verb)	scrutinize (verb)
	examine carefully for accuracy with the intent of verification
	to look at critically or searchingly, or in minute detail