antipasto vs appetiser

antipasto and appetiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
antipasto	Yes	No	No	No
appetiser	Yes	No	No	No

As nouns, appetiser is a hypernym of antipasto; that is, appetiser is a word with a broader meaning than antipasto:

antipasto: a course of appetizers in an Italian meal
appetiser: food or drink to stimulate the appetite (usually served before a meal or as the first course)

Other hypernyms of antipasto include appetizer, starter.

antipasto (noun)	appetiser (noun)
a course of appetizers in an Italian meal	food or drink to stimulate the appetite (usually served before a meal or as the first course)