PHOTOSYNTHESIS /ˌfəʊ.təʊ.ˈsɪn.θə.sɪs/ ► audio Scrabble 25 Words With Friends 24 Scrabble letter values: P3H4O1T1O1S1Y4N1T1H4E1S1I1S1 = 25 Definition noun synthesis of compounds with the aid of radiant energy (especially in plants). See all 792 words you can make from PHOTOSYNTHESIS → 14-letter words Words starting with P Words ending with S ← Unscramble different letters