egotistical vs swollen-headed

egotistical and swollen-headed both are adjectives.

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

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

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

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

egotistical (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