The word retrospected 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: 19
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (61 words)
cestode, cotters, creeped, creeper, crested, decreer, decrees, deepest, deports, deposer, detects, detorts, dotters, erected, erecter, erector, pectose, petered, porters, potters, precede, precode, presort, pretest, proceed, protect, protest, recedes, recodes, records, rectors, reerect, reested, reports, reposed, reposer, rescope, rescore, respect, restore, retorts, retreed, retrees, rosette, rotters, scepter, sceptre, seceder, secrete, specter, spectre, speeder, sported, spotted, spotter, steeped, steeper, steered, steerer, teeters, treetop