The highest scoring word in Words With Friends is INDEPTH with a total of 14 points.
Synonyms: complete, utter, absolute, thorough, perfect, downright, out-and-out, outright, thoroughgoing, all-out, sheer, positive, prize, rank, pure, dyed-in-the-wool, deep-dyed, real, consummate, veritable, unmitigated, unqualified, unadulterated, unalloyed, unconditional, unequivocal, full, unlimited, limitless, infinite, ultimate, through and through, in-depth