추돌rear-end collision; pileup 충돌collision; clash 격돌violent collision; clash 돌격charge 돌격대storm troops 돌기bump; swelling 돌발accident; unforeseen incident 돌발적accidentally; unexpectedly 돌발적accidental; unexpected 돌변sudden change

추진propulsion; pushing; driving 후진국underdeveloped country; less developed country 선진being advanced 선진국advanced country; developed country 직진straight movement 진로course 진출expansion 진학entrance to a higher education institution 진행progress 진행자host; emcee