Similar words
maletero
baúl is more a storage trunk or chest; maletero is specifically a car's trunk or boot.
Similar in other languages
Portuguese
tromba
tromba is the Portuguese word for the same thing — both mean "trunk."
Portuguese
tronco
tronco is the Portuguese word for the same thing — both mean "trunk."
Practice
1 What does baúl mean?
trunk
2 Fill the gap: Guardó mantas en el ___.
Full sentence: Guardó mantas en el baúl. (He kept blankets in the trunk.)
3 Which fingerprint chart matches baúl?
baúl: neutral register, common frequency, general domain, neutral connotation.