How can I root my Verizon Galaxy Note 5?
Unfortunately there is no root currently available for Verizon variants of the note 5. This is due to a completely locked down boot-loader and anti root protection from Samsung Knox.  

It is conceivable that there will never be a root for this particular phone.

Source: http://www.xda-developers.com/root-twrp-available-for-samsung-galaxy-note-5/