Alrighty, the following in your potential parts are used in the series, so I figured I'd give you a bit of a hand (er, paw). Alternatively, you can also use this page
on the wiki (my idea, based on what you started a long time ago!). Anyways, here we go!
Doe is used for a female name Doespring.
Pidgeon is used, although it's spelled Pigeon in the books, for an apprentice named Pigeonpaw.
Stag is used for a male named Stagleap.
Juniper is used for an apprentice named Juniperpaw.
-stalk is used for Ryestalk.
We also have some new ones too! I apologize if these are already mentioned.
Alder is used for Alderpaw
Yarrow is used for Yarrowpaw.
Puddle is now used as prefix for Puddlekit
Sleek is now used for an apprentice named Sleekpaw.
Wasp is used for Wasptail.
Slate is used for Slatekit.
Slight is used for Slightfoot.
Heron is used for Heronwing.
basically there's a lot of new ones come the newer books but those are ones off the top of my head that I can find for you.