adapter vs extra

adapter

noun
  • One who adapts a thing, e.g. a play. 

  • Specifically, a device that allows one format of plug to be used with a different format of socket. 

  • Specifically, an AC adapter: a device that reduces voltage and converts AC to DC to allow a battery-powered device to use mains power. 

  • A device or application used to achieve operative compatibility between devices that otherwise are incompatible. 

  • Specifically, a device that permits two, three, or more plugs to be used at a single electrical power point. 

  • One who is capable of adapting to differing situations. 

extra

noun
  • A supernumerary or walk-on in a film or play. 

  • A run scored without the ball having hit the striker's bat - a wide, bye, leg bye or no ball. 

  • An extra edition of a newspaper, which is printed outside of the normal printing cycle, for example to report an important late-breaking event. 

  • The state or trait of being over the top, of behaving in an overly dramatic manner. 

  • Something additional, such as an item above and beyond the ordinary school curriculum, or added to the usual charge on a bill. 

  • Something of an extra quality or grade. 

det
  • Denotes more. 

adj
  • Beyond what is due, usual, expected, or necessary; extraneous; additional; supernumerary. 

  • Over the top; going beyond what is normal or appropriate, often in a dramatic manner. 

adv
  • To an extraordinary degree. 

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