~(하)는 사람 (actually it stands for a person who does sth) 한국을 사랑하는 사람(a korean lover) 잘 노는 사람을 싫어하는 사람(a player-hater) ~쟁이,~꾼, ~꾸러기(used for a kid) (it's fairly closer to the use of '~er' in English) for a specialist in amusement or entertainment or whatever 점쟁이(a fortune teller, still can be said 점 보는 사람) 노래쟁이(not really used, but for an example) 말썽쟁이, 말썽꾸러기(a trouble maker) 잠꾸러기(a sleeping bug for 'a sleeper' , doesn't make sense though, for an example) ~장이 for a specialist or a professional in certain job, but old term so not really used, i guess 미장이(i don't know what it is in English, an old term means a professional works in a building construction 선수 for sports or some casual terms 야구선수 - a baseball player 축구선수 - a soccer player 선수 - a player Exception, using english pronunciation 패션 디자이너(a fashion designer) 스케이터(a skater) 게이머(a gamer) using korean or chinese-derived word 도박사(a gambler), u can say 도박꾼, but 꾼 means like that you look down the person 배관공(a plumber)