枚挙に遑が無い[maikyoniitomaganai] too many to count

偸閑[akarasama] plain
等閑[naozari] neglect
安閑[ankan] easygoingness
一閑張り[ikkanbari] lacquered papier-mache
閑人[kanjin] man of leisure

閑暇[kanka] leisure
閑居[kankyo] quiet and secluded life
閑散[kansan] deserted (esp. store, market, town, streets)
閑寂[kanjaku] quiet
閑職[kanshoku] leisurely post