abstract
analogy
area
background
balance
ballast
base
beam
bedding
blank
clog
compare
compass
concept
conceptual
counterbalance
deposit
design
equilibrium
evenness
flat
gravitate
heaviness
idea
illustration
lie
mineral
notion
object
parallel
pebble
pedestal
place
plank
platform
podium
rock
scale
set
simile
similitude
space
standard
stone
symbol
symmetric
thought
tract
weight
white