The word declinometer 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: (61 words)
centred, clement, codeine, coterie, decline, deerlet, deleter, demerit, demerol, demonic, demotic, dimeter, dormice, elected, elector, element, eloined, emender, encoder, encored, endemic, entered, enteric, enticed, enticer, erected, incomer, lectern, lection, lemoned, lenited, melodic, merited, metered, miocene, mitered, modeler, moldier, mordent, motlier, needier, needler, noticed, oldtime, onetime, recited, recline, reclone, redline, reelect, relined, remined, remodel, reoiled, retiled, retimed, retinol, teenier, telecom, telomer, tendril