• a shape produced by a curve that bends round and crosses itself

Synonyms: bend, curve, kink, arc

• a structure, series, or process, the end of which is connected to the beginning

• form (something) into a loop or loops; encircle

Synonyms: coil, wind, twist, snake, wreathe, spiral, form a hoop with, form hoops with, make a circle with, make circles with, bend into spirals/whorls