How do you say birch in Korean?
— 박달나무 (bakdal-namu), 자작나무 (jajag-namu, jajak-); 자작나무속

Generic synonyms for birch in Korean
tree나무 (namu)
whip채찍 (chaejjik)
wood나무 (namu), 목재 (木材, mokjae)