party vs bash

party and bash both are nouns.

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

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

party: an occasion on which people can assemble for social interaction and entertainment
bash: an uproarious party

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

party (verb)	bash (verb)
have or participate in a party	hit hard