puff
abstract
aroma
boiling
cigarette
cloud
design
element
emission
emit
evaporation
exhaust
flame
flat
fluid
fog
fragrance
fume
fumes
gas
grill
heat
hot
icon
label
line
mark
odor
odour
perfume
scent
sense
shape
sign
silhouette
small
smell
smoke
smokestack
soot
steam
stench
stream
symbol
vapor
vapour
warm
water