Exact same, except two letters matching instead of one. If anyone breaks the game, PM me and I will add them to the OP for every post that wins. No need to wait for anyone else to think of a new word to begin; if there isn't one, make one up.
A demo:
Katadeus: Postage
Feral: Gelatin
Katadeus: Ingot
Feral: Otter
Katadeus: Ermine
Feral: Nemesis
Starting with:
Turnstile