boaster vs blowhard

boaster and blowhard both are nouns.

Word	Noun	Adjective	Verb	Adverb
boaster	Yes	No	No	No
blowhard	Yes	No	No	No

As nouns, boaster and blowhard are synonyms defined as:

Other synonyms of boaster include braggart, bragger, line-shooter, vaunter.

boaster (noun)	blowhard (noun)
a very boastful and talkative person	a very boastful and talkative person