Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun self-interest

2 senses of self-interest

Sense 1
opportunism, self-interest, self-seeking, expedience -- (taking advantage of opportunities without regard for the consequences for others)
       => selfishness -- (stinginess resulting from a concern for your own welfare and a disregard of others)

Sense 2
egoism, egocentrism, self-interest, self-concern, self-centeredness -- (concern for your own interests and welfare)
       => trait -- (a distinguishing feature of your personal nature)