Catholicism vs papism

Catholicism and papism both are nouns.

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

As nouns, papism is a hyponym of Catholicism; that is, papism is a word with a more specific, narrower meaning than Catholicism:

Other hyponyms of Catholicism include Roman Catholicism, Romanism, Eastern Catholicism.

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