brag vs amplify

brag is a noun but amplify is not a noun.

Word	Noun	Adjective	Verb	Adverb
brag	Yes	Yes	Yes	No
amplify	No	No	Yes	No

As verbs, amplify is a hypernym of brag; that is, amplify is a word with a broader meaning than brag:

Other hypernyms of brag include exaggerate, hyperbolise, hyperbolize, magnify, overdraw, overstate.

brag (noun)	amplify (noun)
an instance of boastful talk

brag (adjective)	amplify (adjective)
exceptionally good

brag (verb)	amplify (verb)
show off	increase in size, volume or significance
	increase the volume of
	exaggerate or make bigger
	to enlarge beyond bounds or the truth