The highest scoring word in Words With Friends is THOROUGHLY with a total of 17 points.
Synonyms: rigorously, in depth, exhaustively, from top to bottom, minutely, closely, in detail, meticulously, scrupulously, assiduously, conscientiously, painstakingly, methodically, carefully, sedulously, completely, comprehensively, fully, to the fullest extent, intensively, extensively
Synonyms: utterly, downright, absolutely, completely, totally, entirely, beyond, really, perfectly, profoundly, properly, consummately, surpassingly, positively, simply, unconditionally, unreservedly, categorically, incontrovertibly, unquestionably, undeniably, in every respect, through and through, outright