puff up vs expand

puff up and expand both are verbs.

Word	Noun	Adjective	Verb	Adverb
puff up	No	No	Yes	No
expand	No	No	Yes	No

As verbs, expand is a hypernym of puff up; that is, expand is a word with a broader meaning than puff up:

Other hypernyms of puff up include amplify, blow up, inflate.

puff up (verb)	expand (verb)
make larger or distend	grow vigorously
to swell or cause to enlarge	exaggerate or make bigger
praise extravagantly	become larger in size or volume or quantity
become filled with pride, arrogance, or anger	expand the influence of
	make bigger or wider in size, volume, or quantity
	add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
	extend in one or more directions