THEORIZE Scrabble 20 Words With Friends 19 Definition verb to believe especially on uncertain or tentative grounds. — synonyms: speculate, theorise, conjecture, hypothesize, hypothesise, hypothecate, suppose verb construct a theory about. verb form or construct theories. See all 80 words you can make from THEORIZE → 8-letter words Words starting with T Words ending with E ← Unscramble different letters