opinionist means one fond of his own notions, or unduly attached to his own opinions. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why “opinionist” is a great word
OPINIONIST — [Noun] A person unduly attached to their own views or one who holds an unusual or heretical opinion. From opinion + -ist, influenced by or compared to French opinioniste. Unlike a dogmatist, who is rigidly bound to an external creed, or a conformist, who yields to the ambient chorus, the opinionist is a sovereign state of one, governed by a constitution of personal conviction. It is the aunt defending her singular method for boiling eggs with tactical fervor, the neighbor whose unshakeable cosmology is built from local weather patterns, or the pamphleteer on a windswept corner distributing treatises on the true shape of the horizon—each a quiet testament to the human capacity to build a furnished universe from the barest scraps of thought.
Etymology
Compare French opinioniste.
noun
- One fond of his own notions, or unduly attached to his own opinions.“every conceited Opinionist sets up an infallible Chair in his own brain”
- One whose unusual or heretical belief or opinion contrasts with the dominant view.