Ground and Testing ground

Ground noun - A small area of usually open land.

Testing ground and ground are semantically related. In some cases you can use "Testing ground" instead a noun "Ground".

Nearby Words: grounded, groundwork, groundless, grounding, groundsman

Testing ground noun - A region resembling a laboratory inasmuch as it offers opportunities for observation and practice and experimentation.

Ground and testing ground are semantically related. You can use "Ground" instead a noun phrase "Testing ground".