Boswell vs champion

Boswell and champion both are nouns.

Word	Noun	Adjective	Verb	Adverb
Boswell	Yes	No	No	No
champion	Yes	Yes	Yes	No

As nouns, champion is a hypernym of Boswell; that is, champion is a word with a broader meaning than Boswell:

Other hypernyms of Boswell include admirer, booster, friend, protagonist, supporter.

Boswell (noun)	champion (noun)
Scottish author noted for his biography of Samuel Johnson (1740-1795)	someone who fights for a cause
a devoted admirer and recorder of another's words and deeds	someone who has won first place in a competition
	a person who backs a politician or a team etc.
	someone who is dazzlingly skilled in any field

Boswell (adjective)	champion (adjective)
	holding first place in a contest

Boswell (verb)	champion (verb)
	protect or fight for as a champion