Sublimation is satisfying an impulse with a substitute, in a socially acceptable way. EX: Someone unleashing aggression through boxing.
I'm going to beat her up.
Denial is blocking external events from one's awareness. The person refuses to experience a situation if it's too much to handle. EX: A smoker can't admit smoking is bad for their health.
Daddy, why won't you quit smoking? It's bad for you.
I'm fine, honey. It just helps me calm down. Nothing to worry about.
Regression is moving back in psychological time when one is faced with stress. EX: A college student so stressed out and missing home that they revert to sleeping with their childhood teddy bear.
This is too much. I just want to go home.
Displacement is satisfying an impulse with a substitute object. EX: Someone placing their anger, directed at their boss, on their house plant.
You're the stupidest plant I've ever met in my life! Why are you in charge?
An individual attributes their own unacceptable thoughts, feelings, or motives onto another person. EX: Someone clearly freaking out over water damage, but believing their spouse is freaking out instead.
Honey, I just don't understand why you're freaking out right now.
An individual overachieving in one area of their life to compensate for failures in another area. EX: A student working extra hard for good math grades when they have stage fright as a member of the drama club.