jewel vs embellish

jewel is a noun but embellish is not a noun.

Word	Noun	Adjective	Verb	Adverb
jewel	Yes	No	Yes	No
embellish	No	No	Yes	No

As verbs, embellish is a hypernym of jewel; that is, embellish is a word with a broader meaning than jewel:

Other hypernyms of jewel include adorn, beautify, decorate, grace, ornament.

jewel (noun)	embellish (noun)
a precious or semiprecious stone incorporated into a piece of jewelry
a person who is as brilliant and precious as a piece of jewelry

jewel (verb)	embellish (verb)
adorn or decorate with precious stones	make more beautiful
	add details to
	make more attractive by adding ornament, colour, etc.
	be beautiful to look at