• 警報けいほう

  alarm, warning

• 警部けいぶ

  police inspector

• 警護けいご

  bodyguard, escort

• 警視けいし

  police superintendent

• 警笛けいてき

  horn, alarm, whistle, foghorn

• 警官けいかん

  police officer, policeman, constable

• 警備けいび

  defense, defence, guard, policing, security

• 警鐘けいしょう

  alarm bell, fire bell

• 警告けいこく

  warning, caution, admonition

• 警戒けいかい

  vigilance, caution, alertness, precaution, being on guard

• 警察けいさつ

  police

• 府警ふけい

  prefectural police (Osaka or Kyoto)

• 県警けんけい

  prefectural police

• 警察署けいさつしょ

  police station

• 警察官けいさつかん

  police officer, policeman, policewoman

• 警視庁けいしちょう

  Metropolitan Police Department

• 警察庁けいさつちょう

  National Police Agency, NPA

• 警報器けいほうき

  alarm (fire, burglar, railroad-crossing, etc.), sensor

• 警らけいら

  patrol

• 警防けいぼう

  guard

• 警醒けいせい

  warning

• 警吏けいり

  police officer

• 警蹕けいひつ

  heralding

• 警砲けいほう

  warning gun, alarm gun

• 警乗けいじょう

  policing (a train)

• 警衛けいえい

  guard, patrol, escort

• 警世けいせい

  warning (to society)

• 警務けいむ

  police affairs

• 警手けいしゅ

  guard, signalman, attendant

• 警句けいく

  aphorism, epigram, witticism, bon mots

• 警泥けいどろ

  cops and robbers (hide-and-seek game)

• 警急けいきゅう

  alarm, emergency, sudden contingency, alert

• 警抜けいばつ

  scintillating, extraordinarily excellent

• 警棒けいぼう

  (police officer's) baton, truncheon, billy club

• 警固けいご

  watching (esp. during an emergency), being on alert

• 警策けいさく

  Zen stick (used by a Zen priest to strike an inattentive zazen sitter), warning stick (Rinzai Zen), encouragement stick (Soto Zen)

• 巡警じゅんけい

  patrolling

• 軍警ぐんけい

  military police

• 連警れんけい

  federal police (US, Brazil, Australia, etc.)

• 自警じけい

  policing (an area, etc.) by oneself, protecting by oneself, vigilantism

• 市警しけい

  city police, municipal police

• 国警こっけい

  national rural police (1947-1954)

• 泥警どろけい

  cops and robbers (hide-and-seek game)

• 海警かいけい

  China Coast Guard

• 夜警やけい

  night watchman

• 婦警ふけい

  policewoman

• 天警てんけい

  heaven-sent warning

• 道警どうけい

  Hokkaido Prefectural Police

• 夜警やけい

  The Night Watch (1642 painting by Rembrandt)

• 警備艇けいびてい

  guardship