The word progressivity 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: 24
Highest Scoring Words With Friends™ Plays In The Letters progressivity
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Seven Letter Word Alert: (69 words)
egoists, egotrip, gipsies, goiters, goitres, goriest, gossipy, gripers, grister, gropers, grosser, grovers, grovets, gypsies, isotype, ivories, ivorist, ospreys, oversit, overtip, oysters, persist, pissier, pitiers, pivoter, porters, posters, poverty, presort, priests, provers, pyrites, regrips, repivot, reports, reposts, resorps, resorts, respots, restirs, revisit, rioters, roister, ropiest, rosiest, rosters, sorters, sorties, spigots, spirits, spriest, sprites, spryest, stivers, stivier, stogeys, stogies, storeys, stories, striper, stripes, stripey, striver, strives, tigress, tipsier, verists, vertigo, visitor