dinner party vs party

dinner party and party both are nouns.

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

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

dinner party (noun)	party (noun)
a party of people assembled to have dinner together	an occasion on which people can assemble for social interaction and entertainment
	a gathering of people for pleasure
	an organization to gain political power
	a band of people associated temporarily in some activity
	a person involved in legal proceedings

dinner party (verb)	party (verb)
	have or participate in a party