Many times I have seen and heard train collectors refer to more than one caboose as cabeese. Unfortunately, there "ain't" such a word. The word caboose is both singular and plural similar to the word sheep, where you have either one caboose or sheep or many caboose or sheep.
So it looks like many train collectors are coining a new word, cabeese. If enough continue to use the word, maybe we can petition a dictionary to include it! Actually, my train room is loaded with cabeese, I mean coboose.
Jim