party vs doer

party and doer both are nouns.

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

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

Other hypernyms of party include actor, worker.

party (noun)	doer (noun)
an occasion on which people can assemble for social interaction and entertainment	a person who acts and gets things done
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

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