pommel vs ornament

pommel and ornament both are nouns.

Word	Noun	Adjective	Verb	Adverb
pommel	Yes	No	Yes	No
ornament	Yes	No	Yes	No

As nouns, ornament is a hypernym of pommel; that is, ornament is a word with a broader meaning than pommel:

Other hypernyms of pommel include decoration, ornamentation.

pommel (noun)	ornament (noun)
handgrip formed by the raised front part of a saddle	something used to beautify
an ornament in the shape of a ball on the hilt of a sword or dagger
a handgrip that a gymnast uses when performing exercises on a pommel horse

pommel (verb)	ornament (verb)
strike, usually with the fist	make more attractive by adding ornament, colour, etc.
	be an ornament to