Dissenter vs reformer

Dissenter

noun
  • A Protestant Christian who does not follow the national state Church of England. 

  • A person who took part in the Dissenters' March in Moscow. 

reformer

noun
  • One who was involved in the Reformation. 

  • One who reforms, or who works for reform. 

  • A device used to convert petroleum refinery naphthas, typically having low octane ratings, into high-octane liquid products called reformates. 

  • A device which converts hydrocarbons into a hydrogen-rich mixture of gases. 

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