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

adjective

relating to crime.

they are charged with conspiracy to commit criminal damage

unlawful,illegal,against the law,illicit,illegitimate,lawbreaking,lawless,felonious,delinquent,culpable,villainous,nefarious,corrupt,fraudulent,indictable,punishable,actionable,unauthorized,unsanctioned,outlawed,banned,forbidden,interdicted,proscribed,wrong,bad,evil,wicked,iniquitous,crooked,shady,dirty,bent,dodgy,malfeasant