papistical vs papist

papistical is not a noun while papist is a noun.

Word	Noun	Adjective	Verb	Adverb
papistical	No	Yes	No	No
papist	Yes	Yes	No	No

As adjectives, papistical and papist are synonyms defined as:

Other synonyms of papistical include papistic, popish, R.C., Roman, Roman Catholic, Romanist, romish.

papistical (noun)	papist (noun)
	an offensive term for Roman Catholics; originally, a Roman Catholic who was a strong advocate of the papacy

papistical (adjective)	papist (adjective)
of or relating to or supporting Romanism	of or relating to or supporting Romanism