The word repayments 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: (37 words)
amnesty, amperes, artsmen, earnest, eastern, entraps, martens, mastery, meanest, nearest, panters, parents, payment, present, pretans, remates, renames, repaste, repeats, repents, restamp, retapes, reteams, retypes, serpent, smarten, stamper, steamer, sterane, streamy, styrene, tampers, tapemen, tempera, tempers, trepans, yestern