Protestant vs Protestant

Protestant and Protestant both are nouns.

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

Protestant (noun)	Protestant (noun)
the Protestant churches and denominations collectively	the Protestant churches and denominations collectively
an adherent of Protestantism	an adherent of Protestantism

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