belief vs surmise

belief

noun
  • The quality or state of believing. 

  • Mental acceptance of a claim as true. 

  • Religious faith. 

  • One's religious or moral convictions. 

  • Faith or trust in the reality of something; often based upon one's own reasoning, trust in a claim, desire of actuality, and/or evidence considered. 

  • Something believed. 

surmise

noun
  • Reflection; thought; posit. 

  • Thought, imagination, or conjecture, which may be based upon feeble or scanty evidence; suspicion; guess. 

verb
  • To imagine or suspect; to conjecture; to posit with contestable premises. 

How often have the words belief and surmise occurred in a corpus of books? (source: Google Ngram Viewer )