1. Shaped like a ring
   - annular, annulate, annulated, circinate, ringed, doughnut-shaped

See also: rounded

• obstructor
• obstruent
• obtain
• obtainable
• obtainment
• obtention
• obtrude
• obtrude upon
• obtruder
• obtrusion
• obtrusive
• obtrusively
• obtrusiveness
• obtund
• obturate
• obturation
• obturator
• obturator vein
• obtuse
• obtuse angle
• obtuse leaf
• obtuse triangle
• obtuse-angled triangle
• obtusely
• obtuseness