party vs dinner

party and dinner both are nouns.

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

As nouns, dinner is a hyponym of party; that is, dinner is a word with a more specific, narrower meaning than party:

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

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