"Irwin, what is the plural of ox?"

— "Oxen! The farmer used his oxen!"

"Brian, what is the plural of box?"

— "Boxen. I bought two boxen of donuts."

"Irwin, what is the plural of goose?"

— "Geese! I saw a flock of geese!"

"Brian, what is the plural of moose?"

— "MOOSEN!"