Similar words
glorieta
rotonda is more common or standard, "roundabout"; glorieta is sometimes used for a more decorative park roundabout or a gazebo-like structure.
Similar in other languages
French
rond-point
rond-point is the French word for the same thing — both mean "roundabout."
Portuguese
rotatória
rotatória is the Portuguese word for the same thing — both mean "roundabout."
Practice
1 What does rotonda mean?
roundabout
2 Fill the gap: Gira en la ___.
Full sentence: Gira en la rotonda. (Turn at the roundabout.)
3 Which fingerprint chart matches rotonda?
rotonda: neutral register, common frequency, general domain, neutral connotation.