Bedrock and Substructures

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

Substructures and bedrock are semantically related In some cases you can replace term "Substructures" with "Bedrock", this nouns are similar.

Bedrock and substructures are semantically related in base topic. Sometimes you can use "Bedrock" instead a noun "Substructures", if it concerns topics such as bottom, foundation, basis for something physical or mental.