braggadocio vs jactitation

braggadocio and jactitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
braggadocio	Yes	No	No	No
jactitation	Yes	No	No	No

As nouns, jactitation is a hypernym of braggadocio; that is, jactitation is a word with a broader meaning than braggadocio:

Other hypernyms of braggadocio include boast, boasting, self-praise.

braggadocio (noun)	jactitation (noun)
vain and empty boasting	(pathology) extremely restless tossing and twitching usually by a person with a severe illness
	speaking of yourself in superlatives
	(law) a false boast that can harm others; especially a false claim to be married to someone (formerly actionable at law)