Another word for critic
One who makes adverse comments
faultfinder, carper, caviler, censor, censurer, quibbler, nitpicker, pettifogger, blamer, detractor, slanderer, maligner, complainer, doubter, nagger, fretter, scolder, disapprover, defamer, disparager, captious critic, Monday morning quarterback*, mudslinger*, knocker*, panner*, basher*.
Antonyms praiser, believer*, supporter.
One who endeavors to interpret and judge
commentator, analyst, analyzer, connoisseur, reviewer, cartoonist, caricaturist, expert, judge, authority, pundit, diagnostic, annotator, master, evaluator, editor, blurb writer; see also connoisseur, examiner, scholar 2.