opportunism vs self-interest

opportunism and self-interest both are nouns.

Word	Noun	Adjective	Verb	Adverb
opportunism	Yes	No	No	No
self-interest	Yes	No	No	No

As nouns, opportunism and self-interest are synonyms defined as:

opportunism and self-interest: taking advantage of opportunities without regard for the consequences for others

Other synonyms of opportunism include expedience, self-seeking.

opportunism (noun)	self-interest (noun)
taking advantage of opportunities without regard for the consequences for others	concern for your own interests and welfare
	taking advantage of opportunities without regard for the consequences for others