knob vs pommel

knob and pommel both are nouns.

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

As nouns, knob and pommel are synonyms defined as:

knob and pommel: an ornament in the shape of a ball on the hilt of a sword or dagger

knob (noun)	pommel (noun)
a round handle	handgrip formed by the raised front part of a saddle
a circular rounded projection or protuberance	an ornament in the shape of a ball on the hilt of a sword or dagger
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
any thickened enlargement

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