remittal vs remission of sin

remittal and remission of sin both are nouns.

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

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

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

Other synonyms of remittal include absolution, remission.

remittal (noun)	remission of sin (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