Ballgame and Mechanical energy

Ballgame noun - A field game played with a ball (especially baseball).

Mechanical energy and ballgame are semantically related. In some cases you can use "Mechanical energy" instead a noun "Ballgame".

Mechanical energy noun - Energy in a mechanical form.

Ballgame and mechanical energy are semantically related. Sometimes you can use "Ballgame" instead a noun phrase "Mechanical energy".