Marrow squash and Summer squash

Marrow squash noun - Any of various squash plants grown for their elongated fruit with smooth dark green skin and whitish flesh.

Summer squash and marrow squash are semantically related. In some cases you can use "Summer squash" instead a noun phrase "Marrow squash".

Summer squash noun - Any of various usually bushy plants producing fruit that is eaten while immature and before the rind or seeds harden.

Marrow squash and summer squash are semantically related. Sometimes you can replace phrase "Marrow squash" with "Summer squash", this phrases are similar.