ultraconservative

From ultra- +‎ conservative.

ultraconservative (comparative more ultraconservative, superlative most ultraconservative)

1. Extremely conservative, especially in politics.

   The John Birch Society is an ultraconservative political group in the USA.

ultraconservative (plural ultraconservatives)

1. A person or group with extremely conservative views.
   • 2014, Jeffrey Krames, Lead with Humility: 12 Leadership Lessons from Pope Francis, page x:

     For example, as pope, Francis challenges the ultraconservatives in the Church to be ultrainclusive of people whom other popes never bothered to embrace: […]