abstract
beam
center
centrifuge
circle
circular
concentric
cyclic
disc
effect
energy
epicenter
flare
geometric
geometry
icon
line
modern
motif
optical
orbit
oval
pattern
radial
radiant
radiating
radius
random
revolve
ring
rotation
round
science
scifi
shape
shockwave
spin
structure
symbol
torsion
twirl
twist
visual
volute
vortex
whirl
whirligig
whorl