Home base and Home ground

Home base noun - (baseball) base consisting of a rubber slab where the batter stands; it must be touched by a base runner in order to score.

Home ground and home base are semantically related. In some cases you can use "Home ground" instead a noun phrase "Home base".

Home ground noun - The type of environment in which an organism or group normally lives or occurs.

Home base and home ground are semantically related. You can use "Home base" instead a noun phrase "Home ground".