1. Having a common centre
   - concentric, homocentric

See also: coaxal, coaxial

• ultimateness
• ultimatum
• ultimo
• ultimogeniture
• ultra
• ultra vires
• ultra-high
• Ultracef
• ultracentrifugation
• ultracentrifuge
• ultraconservative
• ultrahigh frequency
• ultraism
• ultramarine
• ultramarine blue
• ultramicroscope
• ultramicroscopic
• ultramodern
• ultramontane
• ultramontanism
• ultramundane
• ultranationalism
• ultranationalistic
• ultrasonic
• ultrasonically