Can it be safely flashed with Odin over top cwm without Uninstaller it?
Double-check (err, triple-check) your phone model before going the ODIN way, and make sure you grab the correct ODIN-compatible tar file.
I don't think there is an "uninstall" method for a recovery. To change your recovery, you simply overwrite it with another one. The official TWRP website shows three different methods (installing using Goo Manager [recommanded], overwrite the recovery partition using an IMG file, and flashing using ODIN) to achieve TWRP's installation into your device. Please take a look at the project's website for more info.
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