knob vs boss

knob and boss both are nouns.

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

As nouns, knob and boss are synonyms defined as:

knob (noun)	boss (noun)
a round handle	a circular rounded projection or protuberance
a circular rounded projection or protuberance	a person responsible for hiring workers
an ornament in the shape of a ball on the hilt of a sword or dagger	a person who exercises control over workers
any thickened enlargement	a leader in a political party who controls votes and dictates appointments
	a person who exercises control and makes decisions

knob (adjective)	boss (adjective)
	exceptionally good

knob (verb)	boss (verb)
	raise in a relief