7 letters · 10 points in Scrabble
originEtymology tree Latin sulpur Latin sulfur Latin sulphur Anglo-Norman sulfrebor. Middle English sulphur English sulfur Proto-Indo-European *-tósder. Ancient Greek -της (-tēs)der. Ancient Greek -ῑ́της (-ī́tēs)der. Latin -ītēsbor. French -iteder. English -ite English sulfite From sulfur + -ite (“suffix used for salts of acids ending in -ous”).
Etymology from Wiktionary, CC BY-SA 3.0