The word archegonial 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: 20
Highest Scoring Words With Friends™ Play In The Letters archegonial
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Seven Letter Word Alert: (54 words)
achiral, acholia, aeolian, aileron, airhole, aligner, angelic, archeal, archean, arching, calorie, carinae, carinal, carnage, chagrin, chainer, changer, chlorin, cholera, choline, choragi, chorale, choregi, choring, clangor, clarion, clinger, coalier, coaling, coinage, congeal, coreign, corneal, cranial, echoing, glacier, glancer, gracile, granola, halogen, healing, hearing, hernial, inhaler, inreach, ironage, learing, leching, leghorn, organic, realign, rechain, reclang, regalia