Similar but (1) better because it doesn't use coincidental multiple meanings, (2) better because it doesn't use anything so obscure as buffalo=harass, and (3) worse because it needs two different words:

oysters oysters oysters split split split

"oysters split": oysters come apart into two pieces.

"oysters oysters split split": oysters whom oysters split, split: those oysters whom other oysters take apart into two pieces, come apart into two pieces.

"oysters oysters oysters split split split": oysters whom (oysters whom oysters split, split) split: those oysters whom (those oysters whom other oysters take apart into two pieces, in turn take apart into two pieces) come apart into two pieces.

Much as with the buffalo sentence, this works for arbitrary values of 3.