The word celiocentesis 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: 21
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (72 words)
cenotes, cession, ciscoes, clients, clinics, clitics, closest, closets, coesite, colicin, colitis, conceit, concise, consist, cosiest, cosines, elicits, elision, enclose, enlists, entices, eosinic, essence, iceless, icicles, iciness, iconist, incests, incises, incites, inosite, insects, insoles, iolites, ionises, lection, lenites, lesions, licence, license, lioness, lionets, lionise, listens, nestles, netless, nosiest, notices, octenes, oecists, oiliest, osselet, ossicle, science, sconces, section, seitens, selects, sestine, silence, silents, silicon, solicit, steelie, stencil, stenose, tensile, tieless, tinsels, tocsins, toeless, tonsils