Which would be better in an electromagnet FERRITE ROD or rare earth magnet

I am not interested at turning it off or anything i just want it so when i run electricity through my magnet wire it will make a strong magnetic Field. I want to know which would make a stronger Field

Ferrite. If you want to have the magnet stay one after switching off the current use the rare earth magnet. The strength of an electromagnet depends more on the current level x number of turns in your coil if yours is a straight solenoid. If you are looking for one for a motor, there are better magnetic materials available.
The rare earth magnet could buck or boost your field depending on the polarity of its previous magnetization. They are difficult to demagnetize, and if you bought it in magnetized condition, and happened to connect your coil so that the polarity of your coil matched that of the magnet you would get a stronger magnet overall and if you turn the magnet over the field weakens.

It depends on the maximum flux density of the specific materials, but you will not be able to increase the strength of a permanent magnet.

Permanent magnets do not function well as cores of electromagnets.

Low grade iron like nail.