watercolor vs American spelling

watercolor and American spelling both are nouns.

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

watercolor (noun)	American spelling (noun)
the art or technique of painting with watercolors	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
a painting produced with watercolors
a water-base paint (with water-soluble pigments); used by artists
water-soluble pigment

watercolor (verb)	American spelling (verb)
paint with watercolors