The word opportunists 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: 20
Highest Scoring Words With Friends™ Plays In The Letters opportunists
:
Seven Letter Word Alert: (45 words)
intorts, intrust, nitrous, notists, options, outpost, outsits, outspin, pisspot, pistons, poisons, porosis, portion, potions, prisons, protist, protons, purists, riotous, ripstop, risotto, soursop, spinous, spinout, sponsor, sporont, sprints, sprouts, stupors, suitors, sunspot, support, tinpots, tiptops, topspin, topspun, torsion, tosspot, tourist, tropist, turnips, unsorts, unstops, unstrip, uproots