subscriber vs champion

subscriber and champion both are nouns.

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

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

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

subscriber (noun)	champion (noun)
someone who contributes (or promises to contribute) a sum of money	someone who fights for a cause
someone who contracts to receive and pay for a service or a certain number of issues of a publication	someone who has won first place in a competition
someone who expresses strong approval	a person who backs a politician or a team etc.
	someone who is dazzlingly skilled in any field

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

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