SEISMOGRAM Scrabble 15 Words With Friends 18 Scrabble letter values: S1E1I1S1M3O1G2R1A1M3 = 15 Definition noun the graphical record of an earth tremor made by using a seismograph. See all 411 words you can make from SEISMOGRAM → 10-letter words Words starting with S Words ending with M ← Unscramble different letters