abstract
abstraction
amorphous
artistic
biology
botanical
botany
centrifuge
circular
concentric
design
distort
distortion
eco
figure
floral
flower
foliage
formation
freeform
geometric
geometrical
geometry
gyration
harms
icon
irregular
minimal
misc
miscellaneous
monochrome
motif
nonfigural
op
op art
opart
optical
petal
radial
shape
silhouette
simple
torsion
unusual
visual
vortex
whirlpool