The term 'curved shape' can be represented by four different crossword solutions: ARC (3 letters), CRESCENT (8 letters), ESS (3 letters), and LOOP (4 letters). An ARC is a curved line that forms a part of the circumference of a circle. A CRESCENT is a curved shape resembling a moon, often used to represent the phases of the moon. An ESS is a curved letter in the Latin alphabet, usually representing the sound /s/. Finally, a LOOP is a curved or circular line that forms a closed path.