badge vs identifier

badge

noun
  • Something characteristic; a mark; a token. 

  • A police officer. 

  • A small overlay on an icon that shows additional information about that item, such as the number of new alerts or messages. 

  • A carved ornament on the stern of a vessel, containing a window or the representation of one. 

  • A distinctive mark, token, sign, emblem or cognizance, worn on one's clothing, as an insignia of some rank, or of the membership of an organization. 

  • A small nameplate, identifying the wearer, and often giving additional information. 

  • A card, sometimes with a barcode or magnetic strip, granting access to a certain area. 

  • A distinctive mark worn by servants, retainers, and followers of royalty or nobility, who, being beneath the rank of gentlemen, have no right to armorial bearings. 

  • An icon or emblem awarded to a user for some achievement. 

verb
  • To show a badge to. 

  • To mark or distinguish with a badge. 

  • To enter a restricted area by showing one's badge. 

identifier

noun
  • Something that identifies or uniquely points to something or someone else. 

  • One who identifies as a particular type or role; one who says and believes that they are a certain thing. 

  • A formal name used in source code to refer to a variable, function, procedure, package, etc. or in an operating system to refer to a process, user, group, etc. 

  • A primary key. 

  • Someone who identifies; a person who establishes the identity of someone or something. 

  • A guidebook that helps determine the specific class of an object (such as a mushroom, herb, fish, bird, drug, or mineral), or its individual identity (such as that of a star). 

  • A code that distinguishes a particular element from all other elements in a document. 

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