purgation vs purging

purgation and purging both are nouns.

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

As nouns, purging is a hypernym of purgation; that is, purging is a word with a broader meaning than purgation:

purgation: purging the body by the use of a cathartic to stimulate evacuation of the bowels
purging: an act of removing by cleansing; ridding of sediment or other undesired elements

Other hypernyms of purgation include purge.

As nouns, purgation and purging are synonyms defined as:

purgation and purging: the act of clearing yourself (or another) from some stigma or charge

Other synonyms of purgation include purge.

purgation (noun)	purging (noun)
purging the body by the use of a cathartic to stimulate evacuation of the bowels	an act of removing by cleansing; ridding of sediment or other undesired elements
the act of clearing yourself (or another) from some stigma or charge	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

purgation (adjective)	purging (adjective)
	serving to purge or rid of sin