insubstantial
unreal
unsubstantial
aerial
aerie
aeriform
aerodynamic
aerostatic
airish
airlike
airy
alfresco
atmospheric
breezy
ethereal
exposed
fuming
fumy
gaseous
gasified
gasiform
gaslike
gassy
incorporeal
light
mephitic
miasmal
miasmatic
miasmic
open-air
oxyacetylene
oxygenous
ozonic
pneumatic
reeking
reeky
roomy
smoking
smoky
steaming
steamy
tropospheric
vaporing
vaporish
vaporlike
vaporous
vapory
visionary
bird nest
bird's nest
birdnest
habitation
37
axisymmetric
brightly-colored
fibreglass
gaily-painted
heavily-laden
inroad
low-security
neath
onion-shaped
reaction-drive
slowly-moving
summerofcode
three-colored
two-vehicle
unborrowed
welkin
wild-beast