remission of sin vs remittal

remission of sin and remittal both are nouns.

Word	Noun	Adjective	Verb	Adverb
remission of sin	Yes	No	No	No
remittal	Yes	No	No	No

As nouns, remission of sin and remittal are synonyms defined as:

remission of sin and remittal: the act of absolving or remitting; formal redemption as pronounced by a priest in the sacrament of penance

Other synonyms of remission of sin include absolution, remission.

remission of sin (noun)	remittal (noun)
the act of absolving or remitting; formal redemption as pronounced by a priest in the sacrament of penance	the act of absolving or remitting; formal redemption as pronounced by a priest in the sacrament of penance
	an abatement in intensity or degree (as in the manifestations of a disease)
	a payment of money sent to a person in another place