BO
afterdamp
bad breath
bad smell
blackdamp
body odor
breath
chokedamp
cloud
coal gas
damp
effluvium
exhalation
exhaust
exhaust gas
fetid air
fetidity
fetidness
fetor
firedamp
flatus
fluid
foul breath
foul odor
frowst
fume
graveolence
halitosis
haze
malaria
malodor
mephitis
nidor
noxious stench
offensive odor
puff of smoke
reek
reeking
rotten smell
smoke
smudge
steam
stench
stench of decay
stink
vapor
volatile
water vapor
miasmata
air pollution
ambiance
ambience
atmosphere
aftertaste
blight
canker
dampness
effluvia
emanations
ichor
morass
odor
ooze
pall
pestilence
putrefaction
rot
slime
stank
taint
vapors
vapour
whiff
asthma
plasma