Noun

• S: (n) circular, handbill, bill, broadside, broadsheet, flier, flyer, throwaway (an advertisement (usually printed on a page or in a leaflet) intended for wide distribution) "he mailed the circular to all subscribers"
• direct hyponym / full hyponym
• direct hypernym / inherited hypernym / sister term
• derivationally related form

Adjective

• S: (adj) round, circular (having the shape or form of a circle)
• see also
• similar to
• antonym
• W: (adj) square [Opposed to: round] (having four equal sides and four right angles or forming a right angle) "a square peg in a round hole"; "a square corner"
• derivationally related form
• S: (adj) circular, rotary, orbitual (describing a circle; moving in a circle) "the circular motion of the wheel"