Related by context. Frequent words. (Click for all words.) 74 UFOs 73 UFO 64 sightings 47 flying saucer 46 paranormal 44 sighting 44 extraterrestrials 43 apparitions 43 Sightings 42 burglaries 42 unsolved crimes 40 homicides 40 meteor 40 meteor shower 40 unsolved murders 40 funnel clouds 39 sexual assaults 39 thefts 39 extraterrestrial 39 break ins 39 sunspots 39 bird watchers 38 incidents 38 Paranormal 38 apparition 38 birders 38 suicides 37 hoaxes 37 collisions 37 astronomy 37 meteors 37 lightning strikes 37 murders 37 bird species 36 serial killers 36 phenomena 36 arsons 36 rapes 36 fatal accidents 36 conspiracy theorists 35 astronomers 35 disappearances 35 dengue cases 35 tornadoes 35 detections 35 physicists 35 Close Encounters 35 fatal crashes 35 aliens 35 drownings 35 crashes 34 skies 34 NORAD 34 serial killings 34 funnel cloud 34 Astronomy 34 astronomer 34 Suicides 34 airshow 34 fatalities 34 Incidents 33 X Files 33 mysterious disappearance 33 outbreaks 33 molestation 33 meteorite 33 hoax 33 bumblebees 33 fender benders 33 declassified 33 climatologists 33 conspiracy theories 33 Stonehenge 33 sudden acceleration 33 teen pregnancies 33 Murders 33 larcenies 33 accidents 33 fly tipping 33 crimes 33 Bigfoot 33 occurrences 32 historians 32 Burglaries 32 assaults 32 prisoner abuse 32 deaths 32 comet 32 poisonings 32 birder 32 conspiracy theorist 32 eyewitness accounts 32 voter fraud 32 disappearance 32 asteroid 32 carjackings 32 flyby 31 dragonflies 31 DUI arrests 31 meteorites 31 Stephen Hawking