pommel vs knob

pommel and knob both are nouns.

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

As nouns, pommel and knob are synonyms defined as:

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

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

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