Renter 1
- One that receives payment in exchange for the use of one's property by another.
- One that pays rent for the use of another's property; a tenant.
Tenant 2
- One that pays rent to use or occupy land, a building, or other property owned by another.
- A dweller in a place; an occupant.
Rentee already has an answer here: Can "rentee" be used to refer to one who rents an item?
Rentee doesn't apply unless what's being rented is a person, in which case the rentee is the person (slave) being rented.
The difference: a tenant or a rentee will never be the owner receiving payment for use. A renter might be.
The two different meanings of the word renter can usually be distinguished with the words to and from:
- If I rent something to you, I get paid and you get to use it.
- If I rent something from you, I get to use it and you get paid.