Many Britons do not know the difference between a fruit and a Others were unaware that olives, aubergines and butternut squash also belong to the fruit family. In an avocado or olive, the seed is the stone at the centre. This article explains why avocado is technically a fruit. Zucchinis; Pumpkins; Peppers; Butternut squash; Olives; Eggplants; String beans. According to Merriam-Webster, fruits are defined as “edible easy to mistake avocados for vegetables but in the east, it is enjoyed as a fruit. Did you know that all types of squash, including pumpkin and zucchini, are fruits?