agglutinate vs unite

agglutinate

verb
  • To unite, or cause to adhere, as with glue or other viscous substance; to unite by causing an adhesion of substances. 

  • To form through agglutination. 

adj
  • Consisting of root words combined but not materially altered as to form or meaning 

  • United with glue or as with glue; cemented together. 

noun
  • A clump of agglutinated material. 

  • Agglutinated material. 

unite

verb
  • To bring together as one. 

  • To come together as one. 

noun
  • A British gold coin worth 20 shillings, first produced during the reign of King James I, and bearing a legend indicating the king's intention of uniting the kingdoms of England and Scotland. 

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