EGOTISTIC
conceited, egotistic, egotistical, self-conceited, swollen, swollen-headed, vain
(adjective) characteristic of false pride; having an exaggerated sense of self-importance; “a conceited fool”; “an attitude of self-conceited arrogance”; “an egotistical disregard of others”; “so swollen by victory that he was unfit for normal duty”; “growing ever more swollen-headed and arbitrary”; “vain about her clothes”
egotistic, egotistical, narcissistic, self-loving
(adjective) characteristic of those having an inflated idea of their own importance
Source: WordNet® 3.1
Etymology
Adjective
egotistic (comparative more egotistic, superlative most egotistic)
Egotistical.
Source: Wiktionary
E`go*tis"tic, E`go*tis"tic*al, a.
Definition: Addicted to, or manifesting, egotism.
Syn.
– Conceited; vain; self-important; opinionated.
Source: Webster’s Unabridged Dictionary 1913 Edition