Similar words
ave
ave is more formal or scientific, used broadly, including poultry, "aves"; pássaro is more everyday, a small bird.
Similar in other languages
German
Vogel
Vogel is the German word for the same thing — both mean "bird."
Spanish
pájaro
pájaro is the Spanish word for the same thing — both mean "bird."
French
oiseau
oiseau is the French word for the same thing — both mean "bird."
Practice
1 What does pássaro mean?
bird
2 Fill the gap: O ___ cantou.
Full sentence: O pássaro cantou. (The bird sang.)
3 Which fingerprint chart matches pássaro?
pássaro: neutral register, core frequency, general domain, neutral connotation.