Similar words
chorro
chorro is more about a forceful jet; arroyo is more about a natural stream or creek — both can mean "stream."
Similar in other languages
Portuguese
arroio
arroio is the Portuguese word for the same thing — both mean "stream."
Portuguese
córrego
córrego is the Portuguese word for the same thing — both mean "stream."
Portuguese
riacho
riacho is the Portuguese word for the same thing — both mean "stream."
Practice
1 What does arroyo mean?
stream
2 Fill the gap: Cruzamos el ___ a pie.
Full sentence: Cruzamos el arroyo a pie. (We crossed the stream on foot.)
3 Which fingerprint chart matches arroyo?
arroyo: neutral register, common frequency, general domain, neutral connotation.