1. Circular or nearly circular
   - orbicular

See also: simple, unsubdivided

• rubber tree
• rubber tyre
• rubber-base paint
• rubber-necking
• rubberise
• rubberize
• rubberlike
• rubberneck
• rubbernecker
• sociocultural
• socioeconomic
• socioeconomically
• sociogram
• sociolinguist
• sociolinguistic
• sociolinguistically
• sociolinguistics
• sociological
• sociologically
• sociologist
• sociology
• sociology department
• sociometry
• sociopath
• sociopathic