self-serving vs egoistical

self-serving and egoistical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
self-serving	No	Yes	No	No
egoistical	No	Yes	No	No

As adjectives, self-serving and egoistical are synonyms defined as:

self-serving and egoistical: concerned chiefly or only with yourself and your advantage to the exclusion of others

Other synonyms of self-serving include egocentric, egoistic, self-centered, self-centred, self-seeking, selfish.

self-serving (adjective)	egoistical (adjective)
concerned chiefly or only with yourself and your advantage to the exclusion of others	concerned chiefly or only with yourself and your advantage to the exclusion of others