banquet vs dinner

banquet and dinner both are nouns.

Word	Noun	Adjective	Verb	Adverb
banquet	Yes	No	Yes	No
dinner	Yes	No	No	No

As nouns, dinner is a hypernym of banquet; that is, dinner is a word with a broader meaning than banquet:

Other hypernyms of banquet include dinner party.

banquet (noun)	dinner (noun)
a meal that is well prepared and greatly enjoyed	the main meal of the day served in the evening or at midday
a ceremonial dinner party for many people	a party of people assembled to have dinner together

banquet (verb)	dinner (verb)
partake in a feast or banquet
provide a feast or banquet for