教室【きょうしつ】
classroom, lecture room, department (in a university), class, lessons, course, school (for a particular discipline), teaching establishment
寝室【しんしつ】
bedroom
室長【しつちょう】
section chief, laboratory manager, office head, room monitor
王室【おうしつ】
royal family
地下室【ちかしつ】
cellar, basement
氷室【こおりむろ】
ice house, ice room, cold room
病室【びょうしつ】
sickroom, hospital room, ward
浴室【よくしつ】
bathroom
室内【しつない】
indoor, inside the room
温室【おんしつ】
greenhouse, hothouse, conservatory, glasshouse
客室【きゃくしつ】
guest room (at a hotel), guest cabin (on a boat), passenger cabin (on a plane), drawing room
事務室【じむしつ】
office (room)
和室【わしつ】
Japanese-style room
更衣室【こういしつ】
locker room, changing room, dressing room
入室【にゅうしつ】
entering a room, studying under a Buddhist teacher
洋室【ようしつ】
Western-style room
茶室【ちゃしつ】
tearoom, tea house, tea-ceremony room, tea arbour, tea arbor
皇室【こうしつ】
Imperial household
会議室【かいぎしつ】
conference room, council room
研究室【けんきゅうしつ】
laboratory, seminar room, professor's office