photosensitize vs American spelling

photosensitize is not a noun while American spelling is a noun.

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

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

photosensitize (verb)	American spelling (verb)
make (an organism or substance) sensitive to the influence of radiant energy and especially light