noncandidate vs politician

noncandidate and politician both are nouns.

Word	Noun	Adjective	Verb	Adverb
noncandidate	Yes	No	No	No
politician	Yes	No	No	No

As nouns, politician is a hypernym of noncandidate; that is, politician is a word with a broader meaning than noncandidate:

noncandidate: someone who has announced they are not a candidate; especially a politician who has announced that he or she is not a candidate for some political office
politician: a person active in party politics

Other hypernyms of noncandidate include pol, political leader, politico.

noncandidate (noun)	politician (noun)
someone who has announced they are not a candidate; especially a politician who has announced that he or she is not a candidate for some political office	a person active in party politics
	a leader engaged in civil administration
	a schemer who tries to gain advantage in an organization in sly or underhanded ways