The word hairlessness 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: 16
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (45 words)
airless, arsheen, arshine, arshins, ashless, earless, enseals, ensears, harness, hassles, healers, hearses, heiress, hernial, hernias, hissers, inhaler, inhales, lashers, lassies, leaners, leasers, leashes, lessens, nailers, realise, relines, renails, resails, resales, reseals, reshine, sailers, salines, sassier, sealers, serials, sessile, shalier, shiners, shrines, silanes, sinless, slasher, slashes