Related by context. Frequent words. (Click for all words.) 66 supersonic speed 51 velocities 49 scramjet 48 altitudes 48 supersonic 45 hypersonic 45 centrifugal force 44 gaseous hydrogen 42 subsonic 42 speeds 42 Mach 42 warhead 42 combustion chamber 42 combustor 41 #kph [001] 41 unpowered 41 supersonic jet 41 exhaust gases 41 vortices 41 circular orbit 40 #kmh [002] 40 cavitation 40 electrically charged 40 atomic warheads 40 elliptical orbit 40 projectiles 39 #km h [002] 39 interstellar space 39 conventional warheads 39 #-# km h 39 laser pulse 39 rotors 39 neutrons 39 mach 39 afterburner 39 #mph [001] 39 particles 39 penetrator 39 tiny droplets 39 breakneck speeds 39 km h 39 cosmic radiation 38 rpms 38 kmh 38 #rpm [002] 38 trillion electron volts 38 cosmic rays 38 nozzle 38 jet propulsion 38 r min 38 atomic particles 38 #kmph [002] 38 gamma rays 38 electron volts 38 whooshing 38 flagella 38 projectile 38 mph 38 protons 38 altitude 38 centrifugal forces 37 ft lbs 37 propellant 37 propellants 37 kmph 37 proton beams 37 hyperspace 37 kts 37 interstellar 37 Z axis 37 cruising altitude 37 lunar orbit 37 ionosphere 37 interstellar medium 37 updrafts 37 water vapor 37 aerodynamic drag 37 Martian atmosphere 37 magnetic fields 37 kinetic energy 36 thruster 36 Fighting Falcon 36 meteors 36 rpm 36 electromagnets 36 coronal mass ejections 36 nanometer sized 36 warheads 36 atomic nuclei 36 fissile core 36 centrifuges 36 comets 36 turbine engines 36 Enriched uranium 36 electric propulsion 35 electron spin 35 electrons 35 propulsion 35 degrees Fahrenheit 35 fireballs 35 airfoil