The word catholicisms 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: 24
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (27 words)
accosts, atomics, calicos, chamois, chaotic, classic, clastic, clitics, colitis, coltish, comical, ischiac, ischial, italics, mascots, miscast, mitosis, mosaics, sciatic, silicas, sitcoms, socials, solicit, somatic, somitic, stoical, stomach