The word instrumenting 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 instrumenting
:
Seven Letter Word Alert: (90 words)
ensuing, entrust, gunners, gunters, gustier, gutsier, gutters, igniter, ignites, innings, intents, interim, interns, intrust, intuits, inturns, inuring, metrist, minters, mintier, minting, minuets, minuter, minutes, mistier, misting, mistune, misturn, mitiest, mittens, mungers, munites, mustier, mutters, nesting, netting, nitrite, nittier, nursing, nutmegs, nutsier, nutters, nuttier, nutting, reining, remints, rennins, renting, resting, retints, reusing, ringmen, rinsing, ruining, running, runtime, rusting, rutting, setting, sinning, sitting, smiting, smitten, sternum, stinger, stunner, stunter, suiting, sunnier, sunning, tensing, tenting, termini, testing, tiering, timings, tiniest, tinners, tinnier, tinning, tinters, tintier, tinting, tritium, tunings, turning, uniters, unities, uniting, unrisen