| UFO | "Independence Day" vehicle |
| UFO | "Mars Attacks!" sight |
| UFO | "Mars Attacks!" vehicle (Abbr.) |
| UFO | "The Day the Earth Stood Still" craft |
| UFO | "The X-Files" sighting |
| UFO | "V" vehicle |
| UFO | "X-files" phenomenon |
| UFO | 1972 sci-fi TV series |
| UFO | 36-Across craft |
| UFO | Abduction destination in fanciful stories |
| UFO | Aerial anomaly |
| UFO | Aerial anomaly, for short |
| UFO | Airborne saucer: Abbr. |
| UFO | Alien aircraft |
| UFO | Alien aircraft: Abbr. |
| UFO | Alien carrier |
| UFO | Alien craft |
| UFO | Alien craft investigated in "The X-Files": Abbr. |
| UFO | Alien flier |
| UFO | Alien object in the sky |
| UFO | Alien spacecraft |
| UFO | Alien spacecraft: Abbr. |
| UFO | Alien spaceship (Abbr.) |
| UFO | Alien spaceship, for short |
| UFO | Alien spaceship: Abbr. |
| UFO | Alien thing in the sky |
| UFO | Alien vehicle: Abbr. |
| UFO | Alien's ride?: Abbr. |
| UFO | Alien's ship |
| UFO | Alien's ship (abbr.) |
| UFO | Alien's transport, for short |
| UFO | Alien's vehicle: Abbr. |
| UFO | Aliencraft |
| UFO | Aliens' craft |
| UFO | Aliens' transport |
| UFO | Amateur film subject, maybe |
| UFO | Amateur video subject, maybe |
| UFO | An alien's spaceship |
| UFO | An extraterrestrial's vehicle |
| UFO | Anomaly in the sky that is not identifiable |
| UFO | Area 51 craft, supposedly |
| UFO | Area 51 vessel |
| UFO | Blinking light, maybe |
| UFO | Blur in a tabloid pic |
| UFO | Carrier of 13-Down |
| UFO | Cause of many calls to the police, often |
| UFO | Cause of some 911 calls |
| UFO | Craft |
| UFO | Craft from far off |
| UFO | Craft from faraway? |
| UFO | Craft often shown landing on three legs |
| UFO | Craft that hypothetically might travel from Mars or Saturn: Abbr. |
| UFO | Craft the U.S. government has never recognized |
| UFO | Debatable sighting |
| UFO | Dish that's out of this world? |
| UFO | E.T.'s carrier? |
| UFO | E.T.'s craft |
| UFO | E.T.'s craft? |
| UFO | E.T.'s ship |
| UFO | E.T.'s transport |
| UFO | E.T.'s transport? |
| UFO | ET carrier |
| UFO | ET's craft |
| UFO | ET's ride |
| UFO | ET's taxi |
| UFO | ET's vehicle |
| UFO | Eerie sighting, for short |
| UFO | Eerie sky sighting |
| UFO | Extraterrestrial craft: Abbr. |
| UFO | Extraterrestrial's spaceship: Abbr. |
| UFO | Extraterrestrial's transportation: Abbr. |
| UFO | Extraterrestrial's vehicle: Abbr. |
| UFO | Faraway craft? |
| UFO | Faraway transport? |
| UFO | Faraway vessel? |
| UFO | Flying saucer |
| UFO | Flying saucer (abbr.) |
| UFO | Flying saucer, perhaps |
| UFO | Flying saucer: Abbr. |
| UFO | Foreign vehicle? |
| UFO | Frequent conspiracy subject |
| UFO | Frequent hoax subj. |
| UFO | Hover craft? |
| UFO | Hoverer in a tabloid pic |
| UFO | Interstellar vehicle: Abbr. |
| UFO | It may be produced by swamp gas |
| UFO | Light sky, maybe |
| UFO | Many a tabloid pic |
| UFO | Martian carrier? |
| UFO | Martian mover |
| UFO | Martian rover? |
| UFO | Martian's craft, for short |
| UFO | Martian's craft, say |
| UFO | Martians' vehicle |
| UFO | Mysterious aircraft that might be piloted by aliens: Abbr. |
| UFO | Mysterious blip |
| UFO | Mysterious craft seen in the sky: Abbr. |
| UFO | Mysterious flying saucer |
| UFO | Mysterious hovering craft: Abbr. |
| UFO | Mysterious radar blip, for short |
| UFO | Mysterious saucer |
| UFO | Mysterious sight in the sky: Abbr. |
| UFO | Mysterious sighting in the sky, for short |
| UFO | Mysterious sighting in the sky: Abbr. |
| UFO | Mysterious thing in the sky: Abbr. |
| UFO | Mysterious vehicle: Abbr. |
| UFO | Mysterious visitor |
| UFO | NASA concern |
| UFO | Night light, perhaps |
| UFO | Night light? |
| UFO | Object of some amateur films |
| UFO | One encountered in a close encounter |
| UFO | One evidently not filing a flight plan |
| UFO | One might be involved in a hoax |
| UFO | One side in a close encounter |
| UFO | Otherworldly craft, for short |
| UFO | Overhead light, perhaps |
| UFO | Paranormal sighting |
| UFO | Phenomenon in some grainy videos |
| UFO | Pie in the sky? |
| UFO | Popular tabloid subj. |
| UFO | Project Blue Book subj. |
| UFO | Project Blue Book subject |
| UFO | Radar anomaly |
| UFO | Reason for a flood of calls to the police dept., maybe |
| UFO | Roswell craft |
| UFO | Roswell sighting |
| UFO | Rumored Roswell vehicle |
| UFO | Saturnian saucer? |
| UFO | Saucer in the sky: Abbr. |
| UFO | Saucer, maybe |
| UFO | Saucer, perhaps |
| UFO | Saucer-shaped sighting |
| UFO | Sci-fi craft |
| UFO | Sci-fi radar blip |
| UFO | Sci-fi saucer |
| UFO | Sci-fi saucer, for short |
| UFO | Sci-fi saucer: Abbr. |
| UFO | Sci-fi sight |
| UFO | Sci-fi sighting |
| UFO | Sci-fi sky sighting |
| UFO | Sci-fi space vehicle: Abbr. |
| UFO | Sci-fi spacecraft |
| UFO | Sci-fi spacecraft: Abbr. |
| UFO | Sci-fi staple |
| UFO | Sci-fi transport |
| UFO | Sci-fi vehicle |
| UFO | Sci-fi vehicle for aliens |
| UFO | Sci-fi vehicle, for short |
| UFO | Sci-fi vehicle: Abbr. |
| UFO | Seldom-spotted craft |
| UFO | Ship in a sci-fi story: Abbr. |
| UFO | Ship that might come from Mars: Abbr. |
| UFO | Sight in the sky |
| UFO | Sighting subject |
| UFO | Sky light, for short? |
| UFO | Sky light? |
| UFO | Sky phenomenon |
| UFO | Sky sight |
| UFO | Sky sighting |
| UFO | Sky vehicle investigated in "The X-Files": Abbr. |
| UFO | Something encountered in "Close Encounters of the Third Kind" |
| UFO | Space alien's craft: Abbr. |
| UFO | Space ship acronym |
| UFO | Spacecraft in a sci-fi movie, sometimes: Abbr. |
| UFO | Spaceship that some people believe crashed in Area 51: Abbr. |
| UFO | Spooky sighting |
| UFO | Storied abduction craft |
| UFO | Strange flyer |
| UFO | Strange object in the sky |
| UFO | Strange observation in the sky: Abbr. |
| UFO | Strange sighting in the sky, in short |
| UFO | Strange thing seen in the sky: Abbr. |
| UFO | Strange vehicle in the sky?: Abbr. |
| UFO | Strange vision in the sky: Abbr. |
| UFO | Subj. of a certain conspiracy theory |
| UFO | Subj. of many a faked video |
| UFO | Subj. of some 911 calls |
| UFO | Subj. of some amateur photography |
| UFO | Subj. of some conspiracy theories |
| UFO | Subject of a grainy picture? |
| UFO | Subject of a tinfoil hat theory |
| UFO | Subject of certain amateur vids |
| UFO | Subject of many X-Files |
| UFO | Subject of some amateur videos |
| UFO | Subject of some sightings |
| UFO | Supermarket tabloid subject |
| UFO | Tabloid photo subject |
| UFO | Tabloid subj. |
| UFO | Tabloid topic |
| UFO | Tabloid transport |
| UFO | Transport for Martians |
| UFO | Transport for a 30-Across |
| UFO | Unearthly sighting: Abbr. |
| UFO | Unexplained light moving in the sky: Abbr. |
| UFO | Unexplained sighting in the sky: Abbr. |
| UFO | Unexplained vision in the sky: Abbr. |
| UFO | Vehicle that might travel to Neptune: Abbr. |
| UFO | Vehicle that some people believe could be responsible for crop circles: Abbr. |
| UFO | Venusian vehicle? |
| UFO | Venusian vessel |
| UFO | Venusian vessel? |
| UFO | Vessel from way off |
| UFO | Weird thing seen in the sky: Abbr. |
| UFO | What an ET pilots |
| UFO | What some people think crashed near Roswell, New Mexico: Abbr. |
| UFO | What supposedly landed in Roswell, New Mexico in 1947: Abbr. |
| UFO | X-File subj. |
| UFO | X-File subject |