highjacker
Noun
Meaning
a holdup man who stops a vehicle and steals from it
someone who uses force to take over a vehicle (especially an airplane) in order to reach an alternative destination
Source: WordNetSynonyms
highwayman
hijacker
road agent
bandit
outlaw
robber
holdup
thief
gangster
gunman
thug
footpad
padder
skyjacker
air pirate