13-letter words that end in nism
- revolutionism — a belief in revolution or revolutionary ideas
- sanitarianism — the study of sanitation
- solifidianism — a person who maintains that faith alone, without the performance of good works, is all that is necessary for salvation.
- suggestionism — the art of hypnotic suggestion
- superorganism — a form of life composed of mutually interdependent parts that maintain various vital processes.
- tautochronism — the fact or quality of being a tautochrone
- tractarianism — the religious opinions and principles of the Oxford movement, especially in its early phase, given in a series of 90 papers called Tracts for the Times, published at Oxford, England, 1833–41.
- transfeminism — a movement supporting the belief that the rights of transgender women are linked to the feminist movement, specifically the right to assume a gender identity that does not correspond to one’s biological sex assigned at birth.
- transhumanism — a philosophy that explores human transcendence above or beyond organic, corporeal limitations through technological and philosophical evolution.
- vegetarianism — the beliefs or practices of a vegetarian.