noun

a person who has committed a crime.

these men are dangerous criminals

lawbreaker,offender,villain,delinquent,malefactor,culprit,wrongdoer,transgressor,sinner,young offender,juvenile delinquent,felon,thief,robber,armed robber,burglar,housebreaker,shoplifter,mugger,rapist,fraudster,swindler,racketeer,gunman,gangster,outlaw,bandit,terrorist,bioterrorist,narco-terrorist,ecoterrorist,cyberterrorist,agroterrorist,yakuza,holdupper,crook,con,jailbird,(old) lag,lifer,baddie,crim,yardbird,yegg,lighty,tief,tea leaf,cracksman,malfeasant,misfeasor,infractor,miscreant,trespasser,trusty,transport,peculator,defalcator