Mugger

n.	1.	The common crocodile (Crocodilus palustris) of India, the East Indies, etc. It becomes twelve feet or more long.
	1.	A thief who takes property by threatening (or performing) violence on the person who is robbed; a person who commits a mugging; one who mugs. See mug, v. t.

Noun

1.

mugger - a robber who takes property by threatening or performing violence on the person who is robbed (usually on the street)

Mafioso, Young Turk, aggressor, assailant, assailer, assaulter, attacker, bank robber, beast, beldam, berserk, berserker, bomber, bookworm, bruiser, brute, bushranger, demon, devil, dragon, failing student, fiend, fire-eater, firebrand, footpad, fury, goon, gorilla, greasy grind, grind, gun, gunsel, hardnose, hatchet man, hell-raiser, hellcat, hellhound, hellion, highway robber, highwayman, hijacker, holdup man, holy terror, hood, hoodlum, hooligan, hothead, hotspur, incendiary, invader, killer, mad dog, madcap, monster, mug, muscle man, overachiever, plug-ugly, raider, rapist, revolutionary, road agent, robber, rodman, roughneck, sandbagger, savage, she-wolf, spitfire, stickup man, strong-arm man, swotter, termagant, terror, terrorist, tiger, tigress, torpedo, tough, tough guy, train robber, trigger man, ugly customer, underachiever, violent, virago, vixen, wild beast, witch, wolf