Are spuntini a form of appetizers?
It's not a standard.  'Antipasti' (before the meal) would be the typical replacement for 'appetizers'.  Quite a few of the categories on the menu could be classified as antipasti:


Olives
Salumi
Formagi


As Catija points out, the items all seem to be vegetable dishes intended as a starter.

In my opinion (having taken courses on classification &amp; thesaurus design), the menu's a bit of a mess.  I suspect that it's in part from mixing lunch, dinner &amp; bar menus, they have starters, salad &amp; soup courses, small plates (which includes stuff from the starters), main dishes ... and even one category (vegetariano) which mixes both main &amp; side dishes.  

They're also inconsistent on the text after the title ... sometimes it's a translation (Coppa Classic / Fragrant Spiced Pork) or description of the item (Taleggio / Cow's Milk, Nutty, Aromatic, Semi-Soft), some list sides it comes with without translating the main ingredient (Stracci di Grano Arso / Broccoli Rabe, Tomato, Onion, Garlic, Red Chili, &amp; E.V.O.O) or (Veal Osso Buco / Gremolata).

(Note that this says nothing about the food itself -- it might be excellent ... it's just a confusing menu)