drone vs siren

drone

verb
  • To produce a low-pitched hum or buzz. 

  • To speak in a monotone way. 

  • To kill with a missile fired by unmanned aircraft. 

noun
  • One of the fixed-pitch pipes on a bagpipe. 

  • One who performs menial or tedious work. 

  • A person without the ability to think critically and independently, especially one who follows a group blindly; a non-player character. 

  • A remotely controlled aircraft, an unmanned aerial vehicle (UAV). 

  • A Toyota HiAce or a similar van, especially one used by Ugandan state agents to kidnap opposition members. 

  • A male ant, bee or wasp, which does not work but can fertilize the queen. 

  • A genre of music that uses repeated lengthy droning sounds. 

  • A humming or deep murmuring sound. 

  • A low-pitched hum or buzz. 

siren

verb
  • To make a noise with, or as if with, a siren. 

noun
  • A musical instrument, one of the few aerophones in the percussion section of the symphony orchestra (patented as Acme Siren in 1895). 

  • An astrophysical event that can be used for calculating cosmic distances. 

  • A dangerously seductive woman. 

  • A member of a genus of aquatic salamanders of the family Sirenidae, commonly used for all species subsumed under the family of Sirenidae. 

  • A member of an order of mammals of Sirenia. 

  • One of a group of nymphs who lured mariners to their death on the rocks. 

  • One who sings sweetly and charms. 

  • Any of various nymphalid butterflies of the genus Hestina. 

  • A device, either mechanical or electronic, that makes a piercingly loud sound as an alarm or signal, or the sound from such a device (first recorded 1879). 

  • An instrument for demonstrating the laws of beats and combination tones. 

adj
  • Relating to or like a siren. 

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