beacon vs headlight

beacon

noun
  • A signal or conspicuous mark erected on an eminence near the shore, or moored in shoal water, as a guide to mariners. 

  • That which gives notice of danger, or keeps people on the correct path. 

  • An electronic device that broadcasts a signal to nearby portable devices, enabling smartphones etc. to perform actions when in physical proximity to the beacon. 

  • A signal fire to notify of the approach of an enemy, or to give any notice, commonly of warning. 

  • A high hill or other easily distinguishable object near the shore which can serve as guidance for seafarers. 

  • A post or buoy placed over a shoal or bank to warn vessels of danger; also a signal mark on land. (FM 55-501) 

verb
  • To furnish with a beacon or beacons. 

  • To act as a beacon. 

  • To give light to, as a beacon; to light up; to illumine. 

headlight

noun
  • A bright light, with a lens and reflector, on the front of a motor vehicle (or originally a ship or train), designed to illuminate the road when driving at night; normally one of a pair. 

  • A woman's breast. 

  • A jewel; especially a diamond. 

  • Lysergic acid diethylamide (LSD). 

  • A woman's erect nipples, partially masked by clothing. 

How often have the words beacon and headlight occurred in a corpus of books? (source: Google Ngram Viewer )