Doer in Malayalam

Malayalam words whose English meaning includes “doer”:

പ്രവര്‍ത്തകന്‍ (pravarthakan) — Worker, performer, doer, operator, one who encourages.
മോശക്കാരന്‍ (moshakkaaran) — Stupid person, poor man, person of not much worth, person of disgraceful behaviour, wrong doer, deceitful person.