adherent vs turnabout

adherent

adj
  • Adhesive, sticking to something. 

  • Having the quality of clinging or sticking fast to something. 

  • Attaching or pressing against a different organ. 

noun
  • A person who has membership in some group, association or religion. 

turnabout

noun
  • A reversal of a decision or opinion etc; a change of mind or flip-flop 

  • A merry-go-round. 

  • The act of turning about so as to face in the opposite direction 

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