noun (n)

• taking advantage of opportunities without regard for the consequences for others(noun.attribute)

  Synonym:
  expedience, opportunism, self-seeking
  

  source: wordnet30
• concern for your own interests and welfare(noun.attribute)

  Synonym:
  egocentrism, egoism, self-centeredness, self-concern
  Antonym:
  altruism, selflessness
  

  source: wordnet30