self-seeking vs selfish

self-seeking is a noun but selfish is not a noun.

Word	Noun	Adjective	Verb	Adverb
self-seeking	Yes	Yes	No	No
selfish	No	Yes	No	No

As adjectives, self-seeking and selfish are synonyms defined as:

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

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

self-seeking (noun)	selfish (noun)
taking advantage of opportunities without regard for the consequences for others

self-seeking (adjective)	selfish (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