Some examples of hard rock?

Listen to a band called disciple. Theyre a Christian rock band that is really good in my opinion. Im no musician so I couldn't tell you exactly what musical elements make this band hard rock so I think the best way to describe it is for you to listen to them yourself. Listen to the songs "3, 2, 1", "my he'll", "be the silence", and "lay my burdons". These are all some of the best songs by this band. If it turns out you like them, hit me up and I'll try to name off some more bands for you. :D