Child's game and Knucklebones

Child's game noun - A game enjoyed by children.

Knucklebones and child's game are semantically related. In some cases you can replace term "Knucklebones" with "Child's game", this terms are similar.

Knucklebones noun - A game in which jackstones are thrown and picked up in various groups between bounces of a small rubber ball.

Child's game and knucklebones are semantically related. You can use "Child's game" instead a noun "Knucklebones".