What to use for hooking up two antennas together?

I have a rooftop antenna it’s a good antenna but the only problem is it’s only a UHF antenna
I have an indoor antenna “Rabbit Ears” it’s a lower signal strength but it picks up VHF pretty good.
Are they anything that one can buy to put these antennas together without them fighting each other for signal once connected to a tv ? Thank you for any help!!!
I think all of these answers was good and I appreciate everyone’s effort in answering this question!
You all gave me some insight to what I should be doing Thank You, I wish I could give you all Best Answer you all deserve it in my opinion!
I must put this question to a vote THANK YOU ALL!