The word abstractness 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 abstractness
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Seven Letter Word Alert: (45 words)
abasers, abaters, abrases, abreact, abreast, abscess, absents, acaters, actants, actress, ancress, arctans, ascents, assarts, assents, asserts, banters, bassets, basters, battens, batters, brasses, breasts, cabaret, canters, casters, natters, nectars, recants, recasts, rescans, scanter, scarabs, scatter, seabass, searats, seastar, secants, stances, staters, stratas, tartans, tasters, teacart, trances