dissenter

noun1

1. •
   Someone who dissents (disagrees), especially from an established church.

noun2

1. •
   (UK) A Protestant Christian who does not follow the established church, the Church of England.

   • Is it not apparent how vigorously they assail the whole Body of the Dissenters, Men of Religious, Serious, Upright and most Loyal Principles, under the scandalous Names of Fanaticks and Whiggs. — 1682
2. •
   A person who took part in the Dissenters' March in Moscow.