hookup vs merger

hookup

noun
  • A connection. 

  • A brief sexual relationship or encounter. 

  • A sexual partner. 

merger

noun
  • One that merges. 

  • A type of sound change where two or more sounds merge into one. 

  • The legal union of two or more corporations into a single entity, typically assets and liabilities being assumed by the buying party. 

  • An absorption of one or more estate(s) or contract(s) into one other, all being held by the same owner; of several counts of accusation into one judgement, etc. 

  • The act or process of merging two or more parts into a single unit. 

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