The word mesoblastic 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 mesoblastic
:
Seven Letter Word Alert: (64 words)
abioses, abscise, abseils, aimless, albites, alecost, aloetic, amoebic, ascites, astilbe, atomics, atomise, betoils, bimetal, biomass, bisects, blastic, calmest, cambist, castile, castles, celosia, citable, climate, closest, closets, coalise, coalite, cobalts, cobless, combats, cosiest, elastic, embolic, iceboat, icemass, isolate, laciest, lactose, libates, locates, malices, maltose, mascots, metical, miscast, misseat, mitoses, mobiles, molests, mosaics, oecists, ossicle, scabies, seamost, sitcoms, socials, solaces, somatic, somites, stables, stoical, stomies, timbale