The word metastasizing 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: 28
Highest Scoring Words With Friends™ Play In The Letters metastasizing
:
Seven Letter Word Alert: (72 words)
against, agatine, agatise, agatize, agitate, amazing, amentia, amnesia, animate, animist, attains, enigmas, gamiest, gateman, ignites, imagine, imitate, ingests, inmates, inseams, instate, magenta, magnate, magnets, manages, massage, massing, matings, matting, maziest, messing, miniate, mintage, misseat, missing, misting, mitiest, mittens, nametag, sagiest, satiate, seaming, seating, seitans, seizing, sestina, setting, sigmate, signets, simians, sitting, sizings, smiting, smitten, stamens, stamina, stanzas, stating, statins, statism, stigmas, stimies, tasting, teaming, teasing, teazing, testing, timings, tiniest, zaniest, zeatins, zesting