Marrow squash and Zucchini

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

Zucchini and marrow squash are semantically related. In some cases you can replace term "Zucchini" with "Marrow squash", this terms are similar.

Zucchini noun - Marrow squash plant whose fruit are eaten when small.

Marrow squash and zucchini are semantically related. You can use "Marrow squash" instead a noun "Zucchini".