enamel vs tooth enamel

enamel and tooth enamel both are nouns.

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

As nouns, enamel and tooth enamel are synonyms defined as:

enamel and tooth enamel: hard white substance covering the crown of a tooth

enamel (noun)	tooth enamel (noun)
any smooth glossy coating that resembles ceramic glaze	hard white substance covering the crown of a tooth
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)	tooth enamel (verb)
coat, inlay, or surface with enamel