(rare) a flathead, a fish of family Platycephalidae

(archaic) thunder / (obsolete) something ferocious and imposing, a demon or devil

(rare) a birthday

(organic chemistry) acetylene

(archaic, rare) snoring / (archaic, rare) epilepsy

Great Wall of China

long castle or wall / long line of castles / (figuratively) a person who is to become the head of state.

(Internet slang, derogatory) newbie; fag / (Internet slang, derogatory) Internet troll

kitchen (especially in a restaurant)

今日は: good day, good afternoon, hello