Pumpkin and Zucchini

Pumpkin noun - A coarse vine widely cultivated for its large pulpy round orange fruit with firm orange skin and numerous seeds; subspecies of Cucurbita pepo include the summer squashes and a few autumn squashes.

Zucchini and pumpkin are semantically related. In some cases you can use "Zucchini" instead a noun "Pumpkin".

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

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