acknowledgment vs identifier

acknowledgment

noun
  • The act of recognizing in a particular character or relationship; recognition of existence, authority, truth, or genuineness. 

  • The act of a person admitting a child as their own. 

  • A response (ACK) sent by a receiver to indicate successful receipt of a transmission (See Wikipedia article on transmission). 

  • A recognition as genuine or valid; an avowing or admission in legal form. 

  • A reward or other expression or token of gratitude. 

  • A formal statement or document recognizing the fulfillment or execution of a legal requirement or procedure. 

  • An expression of gratitude for a benefit or an obligation. 

  • A message from the addressee informing the originator that the originator's communication has been received and understood. 

  • The act of acknowledging 

identifier

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

  • 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. 

  • 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). 

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

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

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