マスキング
access
architecture
bumpy
camouflage
circle
city
collector
color
conceal
concealment
cover
decorated
decoration
design
disguise
door
drain
drainage
element
environment
exterior
grass
ground
hatch
hatchway
hide
hole
installed
iron
lead
mask
mounted
opening
pit
reference
round
scuttle
sewage
sewerage
square
surface
texture
trap door
trapdoor