endorsement vs libel

endorsement

noun
  • The act or quality of endorsing 

  • Sponsorship, in means of money, by a company, business or enterprise. 

  • An amendment or annotation to an insurance contract or other official document (such as a driving licence). 

  • An instructor's signed acknowledgement of time practising specific flying skills. 

  • Permission to carry out a specific skill or application in a field in which the practitioner already has a general licence. 

  • Support from an important, renowned figure of a media (celebrity, politics, sports, etc.), to get back up. 

libel

noun
  • The act or tort of displaying such a statement publicly. 

  • Any defamatory writing; a lampoon; a satire. 

  • A written declaration or statement by the plaintiff of their cause of action, and of the relief they seek. 

  • A brief writing of any kind, especially a declaration, bill, certificate, request, supplication, etc. 

  • A written or pictorial false statement which unjustly seeks to damage someone's reputation. 

verb
  • To proceed against (goods, a ship, etc.) by filing a libel claim. 

  • To defame (someone), especially in a manner that meets the legal definition of libel. 

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