15 letters · 25 points in Scrabble
originEtymology tree Proto-Indo-European *úp Proto-Indo-European *-er Proto-Indo-European *upér Proto-Italic *super Latin super Latin super-lbor. English super- English conduct Proto-Indo-European *-wós Proto-Indo-European *-iHwósder. Latin -īvus Old French -ifbor. Middle English -yf English -ive English conductive English superconductive From super- + conductive.
Etymology from Wiktionary, CC BY-SA 3.0