The word equidistant 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: 23
Highest Scoring Words With Friends™ Play In The Letters equidistant
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Seven Letter Word Alert: (36 words)
antique, attends, attuned, attunes, aunties, dentist, destain, detains, dietist, distant, ditties, dunites, indites, inquest, inquiet, instate, instead, intuits, quinide, quintet, sainted, sinuate, situate, stained, statued, stinted, student, stunted, tainted, taunted, tautens, tetanus, tidiest, tiniest, unities, unsated