Justifier

n.

1.

One who justifies; one who vindicates, supports, defends, or absolves. Justifiers of themselves and hypocrites. - Strype. That he might be just, and the justifier of him which believeth in Jesus. - Rom. iii. 26.

Noun

1.

justifier - a person who argues to defend or justify some policy or institution; "an apologist for capital punishment" Synonyms: apologist, vindicator

advocate, advocator, apologise, apologist, apologize, excuse, exponent, justify, proponent, rationalise, rationalize, vindicate, vindicator