egoist vs egocentric

egoist and egocentric both are nouns.

Word	Noun	Adjective	Verb	Adverb
egoist	Yes	No	No	No
egocentric	Yes	Yes	No	No

As nouns, egoist and egocentric are synonyms defined as:

egoist and egocentric: a self-centered person with little regard for others

egoist (noun)	egocentric (noun)
a self-centered person with little regard for others	a self-centered person with little regard for others
a conceited and self-centered person

egoist (adjective)	egocentric (adjective)
	concerned chiefly or only with yourself and your advantage to the exclusion of others