4
abstract
aggregate
art
background
black
cipher
concept
count
cube
dark
decorative
design
digit
element
figure
fleck
four
fourth
graphic
grey
icon
image
letter
lie
light
lump
number
numeral
numeric
object
one
piece
pile
reflection
shadow
shape
sign
single
spot
square
stain
sugar
sweet
sweetness
symbol
tetragon
white