enamel vs decorate

enamel is a noun but decorate is not a noun.

Word	Noun	Adjective	Verb	Adverb
enamel	Yes	No	Yes	No
decorate	No	No	Yes	No

As verbs, decorate is a hypernym of enamel; that is, decorate is a word with a broader meaning than enamel:

Other hypernyms of enamel include adorn, beautify, embellish, grace, ornament.

enamel (noun)	decorate (noun)
any smooth glossy coating that resembles ceramic glaze
a paint that dries to a hard glossy finish
hard white substance covering the crown of a tooth
a colored glassy compound (opaque or partially opaque) that is fused to the surface of metal or glass or pottery for decoration or protection

enamel (verb)	decorate (verb)
coat, inlay, or surface with enamel	provide with decoration
	make more attractive by adding ornament, colour, etc.
	award a mark of honor, such as a medal, to
	be beautiful to look at