Knock ons are a term used in rugby to describe when a player accidentally drops the ball forward during play, resulting in a turnover or penalty for the opposing team. Some synonyms for knock ons include fumbles, missteps, mishandles, bungles, blunders, and slip-ups. These terms all convey the idea of a mistake or error in handling the ball. Additionally, knock ons can also be described as turnovers or dropped passes, particularly when they occur during passing sequences. Overall, there are many different ways to describe knock ons in rugby, but they all share the common thread of indicating a mistake in ball handling.