They are the same thing. Zucchini is the Italian word for the fruit which the French call a courgette. The English refer to larger specimens as “marrows” or vegetable marrows. read more
Though squash originated in the Americas, the Zucchini was developed in Italy and was introduced back to the US by Italian immigrants so we use the term zucchini, though some will just refer to them as green summer squash to differentiate them from yellow summer squash which are about the same size and are often used interchangeably. read more
Zucchini are a type of squash, specifically listed as being a type of summer squash. It will taste different from the other squashes out there, though. Zucchinis have also been called Italian squash and just for an fyi (the name is French, it seems) courgette. read more
Squash versus Zucchini comparison chart; Squash Zucchini; Introduction (from Wikipedia) Squashes generally refer to four species of the genus Cucurbita, some varieties of which are also called marrows. These species include C. maxima (hubbard squash, buttercup squash, some varieties of prize pumpkins, such as Big Max), C. read more