Similar words
lanche
lanche is more of a light meal or snack, like an afternoon snack; petisco is more of an appetizer or nibble, bar-snack style.
Similar in other languages
Spanish
tentempié
tentempié is the Spanish word for the same thing — both mean "snack."
Practice
1 What does petisco mean?
snack
2 Fill the gap: Pedi um ___.
Full sentence: Pedi um petisco. (I ordered a snack.)
3 Which fingerprint chart matches petisco?
petisco: neutral register, common frequency, general domain, neutral connotation.