pommel vs ornamentation

pommel and ornamentation both are nouns.

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

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

Other hypernyms of pommel include decoration, ornament.

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

pommel (verb)	ornamentation (verb)
strike, usually with the fist