absolution vs remission of sin

absolution and remission of sin both are nouns.

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

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

absolution 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 absolution include remission, remittal.

absolution (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
the condition of being formally forgiven by a priest in the sacrament of penance