In the US, we call them "Traffic Circles".
The adjective round can have the synonyms circular, ball-shaped, annular, coiled, or curled. The noun round (cycle) has synonyms including stage, sequence, series, or turn. The noun round (bullet) has the synonyms cartridge, ammunition, load, or shell.
get round, avoid, circumvent, depart from, deviate from, pass round, detour round
The adjective round has the synonyms coiled, curled, spherical, and circular.
gather, assemble, accumulate, round up, collect
round tripper, going yard, dinger, four bagger
period, term, fit, spell, turn, interval, round, series, session, cycle, sequence, stint
A wheel is a round device to roll a vehicle on. The wheel rotates around the axle which is fixed to the vehicle.
A tall vehicle maybe a double-decker going round a tight turn at a high speed
put sheets of metal round the outside of the car.
They are synonyms.
The only possible thing that is close to a synonym for the word, "apple," is "a round fruit" or something along those lines. There are no synonyms, truly, for a fruit.
Apogee, circle, circumgyration, course, curve, cycle, ellipse, lap, locus, path, pattern, perigee, rotation, round, track, trajectory.