The word ubiquitousness 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: 30
Highest Scoring Words With Friends™ Play In The Letters ubiquitousness
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Seven Letter Word Alert: (33 words)
biotins, bisques, boniest, bonuses, bouquet, busiest, inosite, inquest, inquiet, insists, ionises, niobite, nosiest, osseins, quonset, sequins, session, sinuous, sinuses, squints, subnets, subnote, subsets, subsist, subsite, subtone, subunit, sunsets, tenuous, tissues, unities, unquiet, unquote