opportunistic vs opportunist

opportunistic is not a noun while opportunist is a noun.

Word	Noun	Adjective	Verb	Adverb
opportunistic	No	Yes	No	No
opportunist	Yes	Yes	No	No

As adjectives, opportunistic and opportunist are synonyms defined as:

opportunistic and opportunist: taking immediate advantage, often unethically, of any circumstance of possible benefit

Other synonyms of opportunistic include timeserving.

opportunistic (noun)	opportunist (noun)
	a person who places expediency above principle

opportunistic (adjective)	opportunist (adjective)
taking immediate advantage, often unethically, of any circumstance of possible benefit	taking immediate advantage, often unethically, of any circumstance of possible benefit