Bedrock and Centerpiece

Bedrock noun - An immaterial thing upon which something else rests.

Centerpiece and bedrock are semantically related. In some cases you can use "Centerpiece" instead a noun "Bedrock".

Centerpiece noun - The central part or aspect of something under consideration.

Bedrock and centerpiece are semantically related. Sometimes you can use "Bedrock" instead a noun "Centerpiece".