If you find yourself mistyping "cabooseu", it's likely you meant to write "caboose". The term refers to the colorful rear car of a train. Double-check your spelling before submitting or consider utilizing auto-correct to avoid this common gaffe.
caboose The train resumed its journey, with the brightly painted caboose bringing up the rear.
caboose u
cabooses The train conductor walked down the length of the train, inspecting the cabooses and making sure they were in good condition for the journey ahead.