adhesion vs union

adhesion

noun
  • An agreement to adhere. 

  • An abnormal union of surface by the formation of new tissue resulting from an inflammatory process. 

  • Persistent attachment or loyalty. 

  • The ability of a substance to stick to an unlike substance. 

  • The binding of a cell to a surface or substrate. 

  • The frictional grip on a surface, of wheels, shoes etc. 

union

noun
  • A trade union; a workers' union. 

  • An affiliation of several parishes for joint support and management of their poor; also the jointly-owned workhouse. 

  • That which is united, or made one; something formed by a combination or coalition of parts or members; a confederation; a consolidated body; a league. 

  • A data structure that can store any of various types of item, but only one at a time. 

  • The act of uniting or joining two or more things into one. 

  • An association of students at a university for social and/or political purposes; also in some cases a debating body. 

  • A joint or other connection uniting parts of machinery, such as pipes. 

  • The act or state of marriage. 

  • The set containing all of the elements of two or more sets. 

  • The state of being united or joined; a state of unity or harmony. 

verb
  • To combine sets using the union operation. 

adj
  • Belonging to, represented by, or otherwise pertaining to a labour union. 

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