swollen vs distended

swollen and distended both are adjectives.

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

As adjectives, swollen and distended are synonyms defined as:

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

swollen (adjective)	distended (adjective)
characteristic of false pride; having an exaggerated sense of self-importance	abnormally distended especially by fluids or gas
abnormally distended especially by fluids or gas