ballista

ballista - noun

an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles

ballista - thesaurus

Scrabble score = 10

Please note that scrabble only allows seven tiles to be placed at once.

"I ran the trial with a small group of students over three weeks before the summer holidays," she says. "I quickly saw the benefits, and signed up."

King's Leadership Academy, Warrington