The word hairsplitting is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 22
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (82 words)
airings, airship, aisling, alights, alright, anglist, arising, aspirin, garnish, gastrin, girlish, hailing, hairpin, halting, harping, harpist, hatpins, hatting, hitting, initial, insight, intagli, lairing, lapsing, largish, lashing, lasting, lathing, lisping, listing, pairing, parings, parsing, parting, pasting, patting, phasing, philtra, pianist, piarist, pigtail, pilings, pintail, pithing, pitting, plating, plights, prating, railing, raising, rasping, ratings, ratting, rattish, sailing, salting, sapling, shaping, sharing, silting, sitting, slating, sparing, spiring, spiting, spright, staring, starlit, stating, straint, tailing, tailpin, tapings, tarnish, tartish, tasting, tigrish, tilings, tilting, tithing, transit, triptan