opportunism

As nouns the difference between greed and opportunism

is that greed is a selfish or excessive desire for more than is needed or deserved, especially of money, wealth, food, or other possessions while opportunism is the practice of taking advantage of any situations or people to achieve an end, often with no regard for principles or consequences.

As nouns the difference between opportunism and speculation

is that opportunism is the practice of taking advantage of any situations or people to achieve an end, often with no regard for principles or consequences while speculation is speculation.

As nouns the difference between taxonomy and opportunism

is that taxonomy is the science or the technique used to make a classification while opportunism is the practice of taking advantage of any situations or people to achieve an end, often with no regard for principles or consequences.