The highest scoring word in Words With Friends is MARKER with a total of 13 points.
Synonyms: notice, signpost, signboard, warning sign, road sign, traffic sign
Synonyms: tester, questioner, interviewer, assessor, marker, inspector
Synonyms: label, ticket, badge, mark, marker, tab, tally, sticker, docket, stub, chit, chitty, counterfoil, flag, stamp