4
5
7
8
9
10
15
17
20
backdrop
backdrops
background
backgrounds
blue
cube
cubes
dice
eight
england
europe
european
fifteen
five
four
game
gaming
gray
green
grey
icosahedral
icosahedron
life
nine
number
numbered
numbers
one
piece
pieces
platonic
rounded
seven
seventeen
sided
single
still
ten
twenty
uk
western