Poor is an adjective, normally meaning that the person described has little money. It can also mean not very good.
A pore, on the other hand, is a tiny opening, normally on skin. It's pores that give you acne! It can also be used as a verb, meaning you're studying something closely.
Finally, pour means to make flow, normally a liquid.
Don't forget that the hands and feet of animals are often called paws!