papism vs Roman Catholicism

papism and Roman Catholicism both are nouns.

Word	Noun	Adjective	Verb	Adverb
papism	Yes	No	No	No
Roman Catholicism	Yes	No	No	No

As nouns, papism and Roman Catholicism are synonyms defined as:

papism and Roman Catholicism: the beliefs and practices of the Catholic Church based in Rome

Other synonyms of papism include Romanism.

papism (noun)	Roman Catholicism (noun)
offensive terms for the practices and rituals of the Roman Catholic Church	the beliefs and practices of the Catholic Church based in Rome
the beliefs and practices of the Catholic Church based in Rome