egotistic vs swollen-headed

egotistic and swollen-headed both are adjectives.

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

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

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

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

egotistic (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
characteristic of those having an inflated idea of their own importance