Similar words
demora
atraso is more about being late; demora is more about something taking a long time, a wait — both mean "delay."
Similar in other languages
Spanish
tardanza
tardanza is the Spanish word for the same thing — both mean "delay."
Practice
1 What does atraso mean?
delay
2 Fill the gap: Houve um ___.
Full sentence: Houve um atraso. (There was a delay.)
3 Which fingerprint chart matches atraso?
atraso: neutral register, core frequency, general domain, neutral connotation.