ISOTHERM /ˈaɪ.səʊˌθɜː(ɹ)m/ Scrabble 13 Words With Friends 13 Scrabble letter values: I1S1O1T1H4E1R1M3 = 13 Definition noun (meteorology) an isogram connecting points having the same temperature at a given time. See all 304 words you can make from ISOTHERM → 8-letter words Words starting with I Words ending with M ← Unscramble different letters