gendarme (n.)

• bailiff
• beadle
• beagle
• bluecoat
• bobby
• bull
• captain
• commissioner
• constable
• cop
• copper
• deputy
• detective
• dick
• fed
• federal
• flatfoot
• fuzz
• gumshoe
• heat
• inspector
• lieutenant
• marshal
• narc
• officer
• paddy
• patrolman
• peeler
• pig
• policeman
• policewoman
• reeve
• roundsman
• sergeant
• shamus
• sheriff
• superintendent
• tipstaff
• trooper