opportunist vs hustler

opportunist and hustler both are nouns.

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

As nouns, hustler is a hyponym of opportunist; that is, hustler is a word with a more specific, narrower meaning than opportunist:

opportunist: a person who places expediency above principle
hustler: a shrewd or unscrupulous person who knows how to circumvent difficulties

Other hyponyms of opportunist include backscratcher, bottom feeder, carpetbagger, operator, wheeler dealer, timeserver.

opportunist (noun)	hustler (noun)
a person who places expediency above principle	a shrewd or unscrupulous person who knows how to circumvent difficulties
	a prostitute who attracts customers by walking the streets

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