American spelling vs euthanize

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

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

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

American spelling (verb)	euthanize (verb)
	intentionally cause the painless death of a person or animal