9 letters · 15 points in Scrabble
noun an additional charge (as for items previously omitted or as a penalty for failure to exercise common caution or common skill)
verb charge an extra fee, as for a special service
verb rip off; ask an unreasonable price
originFrom Middle French surcharge, from Old French. By surface analysis, sur- + charge. Doublet of supercharge.
Etymology from Wiktionary, CC BY-SA 3.0