radius (n.)
- ambit
- amplitude
- annulus
- approach
- area
- areola
- asymptote
- aureole
- axis
- beeline
- bigness
- body
- bore
- bottleneck
- breadth
- bulk
- caliber
- carry
- chaplet
- chord
- circle
- circuit
- circumference
- circus
- compass
- concentration
- concourse
- concurrence
- confluence
- conflux
- congress
- convergence
- converging
- corona
- coronet
- coverage
- crossing
- crown
- cycle
- depth
- diadem
- diagonal
- diameter
- diapason
- diffusion
- dimension
- discus
- disk
- dispersion
- edge
- emanation
- expanse
- expansion
- extension
- extent
- focalization
- focus
- funnel
- gamut
- garland
- gauge
- girth
- glory
- greatness
- halo
- height
- hub
- largeness
- lasso
- length
- loop
- magnitude
- mass
- measure
- measurement
- meeting
- noose
- normal
- orbit
- perpendicular
- proportion
- proportions
- purview
- radiance
- radiation
- range
- ray
- reach
- register
- ring
- round
- roundel
- saucer
- scale
- scattering
- scope
- secant
- segment
- semidiameter
- shortcut
- side
- size
- spectrum
- sphincter
- spoke
- spread
- straight
- straightaway
- stretch
- sweep
- tangent
- vector
- volume
- wheel
- width
- wreath