ceiling (n.)
- acme
- aerospace
- airspace
- all
- altitude
- apogee
- bound
- boundary
- bourn
- bump
- burn
- circumscription
- clarity
- clearness
- climax
- compass
- conspicuousness
- crosswind
- crown
- cutoff
- deadline
- definiteness
- definition
- delimitation
- descent
- determinant
- distinctness
- eaves
- elevation
- eminence
- end
- evidence
- exaltation
- extreme
- extremity
- finish
- flight
- floor
- fog
- front
- frontier
- hauteur
- hedge
- height
- highness
- hole
- housetop
- ignition
- impact
- inflation
- interface
- ionosphere
- lantern
- launch
- limen
- limit
- limitation
- line
- loftiness
- march
- mark
- maximum
- mete
- obviousness
- overcast
- overhead
- peak
- penthouse
- pinnacle
- plainness
- prominence
- ridgepole
- roof
- roofing
- rooftop
- rooftree
- roughness
- seeing
- shingles
- shoot
- shot
- skylight
- soup
- space
- start
- stature
- stratosphere
- sublimity
- summit
- tallness
- term
- terminus
- threshold
- tiles
- top
- trajectory
- tropopause
- troposphere
- trough
- turbulence
- utmost
- uttermost
- visibility
