add
alone
apart
blue
children
close
cloth
combination
combine
curve
double
enigma
game
holiday
home
incomplete
indefinite
inseparable
insoluble
irregular
make
material
move
one
paper
part
pazzle
play
poser
puzzle
puzzling
reach
riddle
school
science
side
simple
single
stack
teach
teaser
three
tight
touch
two
unfinished
wooden