operator vs self-seeker

operator and self-seeker both are nouns.

Word	Noun	Adjective	Verb	Adverb
operator	Yes	No	No	No
self-seeker	Yes	No	No	No

As nouns, self-seeker is a hypernym of operator; that is, self-seeker is a word with a broader meaning than operator:

operator: a shrewd or unscrupulous person who knows how to circumvent difficulties
self-seeker: a person who places expediency above principle

Other hypernyms of operator include opportunist.

operator (noun)	self-seeker (noun)
an agent that operates some apparatus or machine	a person who places expediency above principle
someone who owns or operates a business
a shrewd or unscrupulous person who knows how to circumvent difficulties
a speculator who trades aggressively on stock or commodity markets
(mathematics) a symbol or function representing a mathematical operation