puff out vs blow up

puff out and blow up both are verbs.

Word	Noun	Adjective	Verb	Adverb
puff out	No	No	Yes	No
blow up	No	No	Yes	No

As verbs, puff out and blow up are synonyms defined as:

Other synonyms of puff out include puff, puff up.

puff out (verb)	blow up (verb)
to swell or cause to enlarge	make large
	exaggerate or make bigger
	to swell or cause to enlarge
	cause to burst with a violent release of energy
	fill with gas or air
	burst and release energy as through a violent chemical or physical reaction
	add details to
	get very angry and fly into a rage