Similar words
atraco
atraco specifically implies an armed robbery or holdup, like a bank robbery; robo is the general word for "robbery, theft."
Similar in other languages
Portuguese
assalto
assalto is the Portuguese word for the same thing — both mean "robbery."
Portuguese
roubo
roubo is the Portuguese word for the same thing — both mean "robbery."
Practice
1 What does robo mean?
robbery
2 Fill the gap: Hubo un ___ en el banco.
Full sentence: Hubo un robo en el banco. (There was a robbery at the bank.)
3 Which fingerprint chart matches robo?
robo: neutral register, common frequency, general domain, neutral connotation.