unethical vs. immoral

unethical

adjective

  1. lacking moral principles; unwilling to adhere to proper rules of conduct.

  2. not in accord with the standards of a profession.

    She treated patients outside the area of her training, and the appropriate medical organization punished her unethical behavior.

immoral

adjective

  1. violating moral principles; not conforming to the patterns of conduct usually accepted or established as consistent with principles of personal and social ethics.

  2. licentious or lascivious.