puff
explosion
abstract
air
ash
backdrop
background
bang
black
blue
burst
chemical
chemistry
cigarette
cloud
cloudy
color
design
dye
effect
element
fog
fogginess
fume
gas
gauze
haze
hazy
illustration
ink
mist
nebula
nebular
pigment
science
shape
smog
smoke
smoky
space
splash
steam
template
toxic
vapor
vapour