religious belief vs Protestant

religious belief and Protestant both are nouns.

Word	Noun	Adjective	Verb	Adverb
religious belief	Yes	No	No	No
Protestant	Yes	Yes	No	No

religious belief (noun)	Protestant (noun)
a strong belief in a supernatural power or powers that control human destiny	the Protestant churches and denominations collectively
	an adherent of Protestantism

religious belief (adjective)	Protestant (adjective)
	of or relating to Protestants or Protestantism