The word hematological 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 hematological
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Seven Letter Word Alert: (32 words)
acholia, alcogel, alcohol, alethic, alltime, aloetic, calomel, catalog, catelog, cholate, climate, coalite, collage, collate, ethical, gallate, gametic, glacial, helical, hellcat, lacteal, logical, magical, megahit, metical, micella, oatmeal, oghamic, ootheca, thalami, tillage, tollage