The word echocardiogram 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 echocardiogram
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Seven Letter Word Alert: (62 words)
admirer, airhead, archaic, armoire, armored, cacemia, cardiac, carried, ceramic, chaired, charade, charged, charger, charier, charmed, charmer, charred, chimera, choicer, choragi, choregi, choroid, chromed, chromic, coached, cochair, comedic, comrade, cordage, corrode, damager, decaohm, deciohm, diagram, diorama, dormice, drachma, grimace, groomed, groomer, hagride, hagrode, hardier, hoarder, hoarier, homaged, marched, marcher, married, megarad, mirador, moocher, moodier, moorage, oghamic, orchard, racecar, racemic, regroom, roached, roadhog, roomier