American spelling vs amortization

American spelling and amortization both are nouns.

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

American spelling (noun)	amortization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	payment of an obligation in a series of installments or transfers
	the reduction of the value of an asset by prorating its cost over a period of years