Related by context. Frequent words. (Click for all words.) 60 lighthouse 52 lighthouses 49 illuminator 49 illuminators 48 cupola 47 Cupola 47 eyepiece 46 telescope 46 parabolic trough 46 pendant lights 46 reflector 46 leaded glass 45 stained glass 45 louvers 45 candelabra 45 optical telescope 45 sconces 45 polychrome 44 polarized sunglasses 44 clapboards 44 megawatt turbine 44 wall sconces 44 paddlewheel 44 lighthouse keepers 44 masted schooner 44 chronograph 44 cedar shingles 44 casement windows 43 sapphire crystal 43 stained glass windows 43 candleholder 43 LED lights 43 interferometer 43 pinhole camera 43 ultraviolet UV 43 prisms 43 Illuminator 43 Stained glass 43 leaded glass windows 43 LED headlamps 43 dory 43 reflectors 43 Dan Flavin 43 octagonal 43 porthole 43 fluorescent tube 42 lantern 42 diffractive 42 Murano glass 42 sundials 42 photodetector 42 hemispherical 42 sextant 42 altarpiece 42 adaptive optics 42 radome 42 CCD camera 42 infrared IR 42 heliostats 42 infrared laser 42 scanning electron microscope 42 balustrade 41 amphora 41 candleholders 41 telescopes 41 windings 41 domed ceiling 41 radiometer 41 transmission electron microscope 41 waterwheel 41 interplanetary spacecraft 41 SmartBeam 41 orbiting telescope 41 transoms 41 gilt bronze 41 electromagnets 41 lamps 41 pilothouse 41 solar concentrator 41 LED illumination 41 optical microscope 41 optically 40 Hubble Telescope 40 diverters 40 observatory 40 louvered 40 masted 40 candelabras 40 photodiode 40 chandelier 40 chronometer 40 lighthouse keeper 40 Lighthouses 40 crystal chandelier 40 photodiodes 40 fresco 40 fireboat 40 tripod 40 orbiting observatory 40 Voyager spacecraft 40 balustrades