self-conceited vs swollen-headed

self-conceited and swollen-headed both are adjectives.

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

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

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

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

self-conceited (adjective)	swollen-headed (adjective)
characteristic of false pride; having an exaggerated sense of self-importance	characteristic of false pride; having an exaggerated sense of self-importance