four-masted

Great quantities are taken in large four-masted ships to Liverpool, England, and there made into American flour.

I'd choose me a four-masted schooner, carrying freight and going somewhere, anywhere, no one knows where.

Also, she was four-masted, instead of the usual three, and her hull and lower spars were of steel instead of wood.

Used to be cap'n of a four-masted schooner, till he hurt his back and had to stay ashore.

An old print of the "Finis Belli" shows a four-masted ship with a high poop and forecastle, but with a low freeboard amidships.