puffy vs swollen

puffy and swollen both are adjectives.

Word	Noun	Adjective	Verb	Adverb
puffy	No	Yes	No	No
swollen	No	Yes	No	No

As adjectives, puffy and swollen are synonyms defined as:

Other synonyms of puffy include bloated, distended, intumescent, tumescent, tumid, turgid.

puffy (adjective)	swollen (adjective)
being puffed out; used of hair style or clothing	characteristic of false pride; having an exaggerated sense of self-importance
blowing in puffs or short intermittent blasts	abnormally distended especially by fluids or gas
abnormally distended especially by fluids or gas