Can you use an unlocked sprint iphone on verizon?

Please let me know i know there has to be a way

Yes. As long as the phone is unlocked you can go to Any carrier!

No. CDMA providers, such as Verizon and Sprint, are notorious for being unwilling to allow customers to use phones that weren't sold directly by the provider. Even if you jailbreak it and unlock it, the esn (electronic serial number), won't show up on the opposite carriers approved networks.