the cucumber family
legumes
A cucumber is a creeping plant of the gourd family occurring in many cultivated forms.
Basicly cucumber and zuccini are the same but there are a few small differences. And yes you can replace cucumber with zucchini.
Usually, "pickle" refers to a pickled cucumber, in which case it is not a squash. A cucumber is a member of the gourd family. The gourd family includes squash. So, a cucumber is not a squash, but it is related to a squash. Sometimes, members of the squash family are pickled.
'pea' has three letters, but I'm not sure if it is considered a fruit... *technically a pea is a fruit because it has the seeds. So is a cucumber / tomato/ bean. Can only think of fig
Pea family
Pea family
While both are members of the gourd family, zucchini is a squash; cucumber is not.
Cucumbers are in the gourd family, and since gourds are vegetables I would say a cucumber is a vegetable.
legumes
Yes. They both belong to the family Cucurbitaceae.