ranter Meaning, Definition & Usage

  1. noun someone who rants and raves; speaks in a violent or loud manner
    raver.

WordNet

Rant"er noun
Definitions
  1. A noisy talker; a raving declaimer.
  2. (Eccl. Hist.) (a) One of a religious sect which sprung up in 1645; -- called also Seekers. See Seeker. (b) One of the Primitive Methodists, who seceded from the Wesleyan Methodists on the ground of their deficiency in fervor and zeal; -- so called in contempt.

Webster 1913