DIPHTHONGIZED Scrabble 33 Words With Friends 34 Definition DIPHTHONGIZED is the past tense of DIPHTHONGIZE. verb DIPHTHONGIZE: change from a simple vowel to a diphthong. See all 365 words you can make from DIPHTHONGIZED → 13-letter words Words starting with D Words ending with D ← Unscramble different letters