Similar words
caverna
gruta is more picturesque or smaller, a grotto, often touristy; caverna is more general or larger, a big cave, which can be more wild.
Similar in other languages
German
Höhle
Höhle is the German word for the same thing — both mean "cave."
Spanish
cueva
cueva is the Spanish word for the same thing — both mean "cave."
Spanish
gruta
gruta is the Spanish word for the same thing — both mean "cave."
Practice
1 What does gruta mean?
cave
2 Fill the gap: Entramos na ___.
Full sentence: Entramos na gruta. (We entered the cave.)
3 Which fingerprint chart matches gruta?
gruta: neutral register, common frequency, general domain, neutral connotation.