Ways to make the world a better place

So let me get this straight -

pirates - arrrrrrrrrrrrrrrrrrrrrr

zombies - urrrrrrrrrrrrrrrrrrrrrr

cats – purrrrrrrrrrrrrrrrrrrrrr

cars – whrrrrrrrrrrrrrrrrrrrrrr

dogs – grrrrrrrrrrrrrrrrrrrrrr

eskimos – brrrrrrrrrrrrrrrrrrrrrr

philosophers – errrrrrrrrrrrrrrrrrrrrr

Since the only thing separating all these things seems to a couple of letters, why not omit them entirely? Then they can share the one word between them. Also, it would effectively turn all eskimos into ninjas, which would make the world a much safer place. (Then again zombies would become pirates and pirates zombies, which mightn’t be so safe, but you can’t have everything.)