eager vs American spelling

eager and American spelling both are nouns.

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

eager (noun)	American spelling (noun)
a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

eager (adjective)	American spelling (adjective)
having or showing keen interest or intense desire or impatient expectancy