puffery vs flattery

puffery and flattery both are nouns.

Word	Noun	Adjective	Verb	Adverb
puffery	Yes	No	No	No
flattery	Yes	No	No	No

As nouns, flattery is a hypernym of puffery; that is, flattery is a word with a broader meaning than puffery:

puffery: a flattering commendation (especially when used for promotional purposes)
flattery: excessive or insincere praise

puffery (noun)	flattery (noun)
a flattering commendation (especially when used for promotional purposes)	excessive or insincere praise