desynchronization vs American spelling

desynchronization and American spelling both are nouns.

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

desynchronization (noun)	American spelling (noun)
the relation that exists when things occur at unrelated times	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')