swollen-headed vs swollen

swollen-headed and swollen both are adjectives.

Word	Noun	Adjective	Verb	Adverb
swollen-headed	No	Yes	No	No
swollen	No	Yes	No	No

As adjectives, swollen-headed and swollen are synonyms defined as:

swollen-headed and swollen: characteristic of false pride; having an exaggerated sense of self-importance

Other synonyms of swollen-headed include conceited, egotistic, egotistical, self-conceited, vain.

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