The word remaindering 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: 20
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (71 words)
adenine, admirer, amender, angered, angrier, damning, darning, deeming, denarii, deraign, derange, dernier, diamine, dingier, drainer, dreamer, earning, earring, enamine, endgame, engined, enraged, germane, germier, gnarred, grained, grainer, grander, grenade, grimier, grinder, grinned, grinner, imagine, ingrain, mangier, mariner, married, marring, meagrer, meander, meaning, mending, minding, nearing, needing, nerdier, raiding, rainier, raining, randier, rangier, readier, reading, reamend, reaming, rearing, rearmed, redream, regimen, regrade, regrind, reigned, reigner, reimage, reining, remined, renamed, rending, ringman, ringmen