The word breastpins 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: 17
Highest Scoring Words With Friends™ Play In The Letters breastpins
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Seven Letter Word Alert: (61 words)
absents, antsier, aptness, aspires, baiters, banters, baptise, barites, basters, braises, breasts, entraps, inserts, instars, insteps, nastier, painter, pansies, panters, panties, parents, paresis, parties, pasters, pastier, pasties, patines, persist, pertain, pirates, praises, pretans, priests, pterins, rapists, rebaits, repaint, repasts, resnaps, respans, respins, restain, retains, retinas, satires, seitans, sestina, sinters, snipers, sparest, spinets, spireas, sprains, spriest, sprints, sprites, stainer, strains, stripes, traipse, trepans