The word agrobacterium 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: 25
Highest Scoring Words With Friends™ Play In The Letters agrobacterium
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Seven Letter Word Alert: (70 words)
aborter, abreact, acrobat, aerator, aerobic, airboat, amateur, amoebic, arbiter, arcuate, armoire, aurorae, autocar, barmier, barrage, baruria, bourgie, bromate, bromite, brucite, brumate, burrito, cabaret, caribou, cartage, courage, courier, crabier, creator, crumber, curator, embargo, erotica, erratic, erratum, gametic, goburra, gourmet, goutier, grimace, grouter, iceboat, macabre, margate, maturer, megabat, megabit, microbe, migrate, muriate, octamer, orbiter, outbrag, outrace, outrage, ragtime, rarebit, ratrace, reactor, recruit, regrout, ribcage, terbium, tramcar, trigram, tumeric, umbrage, uraemia, uraemic, urogram