Synonyms:
apologist, vindicator, justifier
Meaning: a person who argues to defend or justify some policy or institution; "an apologist for capital punishment"
Usage examples
We might go on asking Why? and Why? and Why? in this fashion on a hundred points, confident that to not one of our questions could the Christian apologist give a straightforward and satisfactory answer.
But the difficulties of the poor apologist are enormously increased if he must further contend that many bodies of the saints came out of their graves, and went into the holy city, and appeared unto many, and still there is no external evidence.