The top point earner in my last Scrabble Blast game, the "best word" was Petition. 99 points.
Other words from the game as a poem:
Lying moon, eau warm river.
Hanging waif ooze hubs, nod via lark.
Exceed, yet creep.
Use of best word in a sentence:
"She started a petition to get a share of future book royalties, not just flowers, from Professor Gates."
More forthcoming at #sixwords.