purgatorial vs purgation

purgatorial is not a noun while purgation is a noun.

Word	Noun	Adjective	Verb	Adverb
purgatorial	No	Yes	No	No
purgation	Yes	No	No	No

purgatorial (noun)	purgation (noun)
	purging the body by the use of a cathartic to stimulate evacuation of the bowels
	the act of clearing yourself (or another) from some stigma or charge
	a ceremonial cleansing from defilement or uncleanness by the performance of appropriate rites

purgatorial (adjective)	purgation (adjective)
of or resembling purgatory
serving to purge or rid of sin