Term for phrases that combine abstract and concrete elements

Is there a term for words that are a combination of abstract and concrete nouns?

For example: Mental floss, Pipe dream, Relational glue

See reifying at Merriam Webster. The process is called Reification. It is defined as

to consider or represent (something abstract) as a material or concrete thing : to give definite content and form to (a concept or idea)

Read this Wikipedia link. It is pretty elaborate. It explains different constructs.

You'll also find concretism to be interesting which seems to define what you're looking for, though all definitions I found are related to poetry.