exaggerate vs bluster

exaggerate is not a noun while bluster is a noun.

Word	Noun	Adjective	Verb	Adverb
exaggerate	No	No	Yes	No
bluster	Yes	No	Yes	No

As verbs, bluster is a hyponym of exaggerate; that is, bluster is a word with a more specific, narrower meaning than exaggerate:

exaggerate (noun)	bluster (noun)
	a swaggering show of courage
	vain and empty boasting
	a violent gusty wind
	noisy confusion and turbulence

exaggerate (verb)	bluster (verb)
to enlarge beyond bounds or the truth	act in an arrogant, overly self-assured, or conceited manner
do something to an excessive degree	show off
	blow hard; be gusty, as of wind