Tunnel Parameters Confusion

Is there some reason that the parameters that define WireGuard Tunnels have different
names on the Tunnel Server side and on the Tunnel Client side? 
Server side has
   Tunnel Server DNS Name
   Client  
   Key
   Client    (why have two parameters with same name?)
Client side has
   Server
   Pwd
   Network

We are building a WG Tunnel Mesh Island locally, and this has caused all of us
difficulties until we had done it at least once.

It seems like the following names would be easier to understand.
SERVER SIDE                   CLIENT SIDE
Tunnel Server DNS Name    Tunnel Server DNS Name
Client                                 <not used here>
Key                                   Key
Network                             Network

--Tim  K5RA