壁紙: wallpaper (all senses)

三味: a samisen: a Japanese stringed instrument played by plucking, vaguely similar to a banjo

板紙: paperboard, cardboard

海砂, 水魚, 水菜, 水奈, 瑞菜, 瑞奈, 瑞那, 瑞凪: a female given name / 瑞名, 瑞鳴, 瑞和, 泉菜, 泉奈, 美子成: a female given name / 水納, 水名: a surname

水菜: mizuna

安眠: sound sleep

安眠: to sleep soundly

三毛: calico fur; (informal) a calico cat.

水山, 端山: a surname

三澤, 三沢, 美沢: a surname