gaff-headed sail, gaffsail - a quadrilateral fore-and-aft sail suspended from a gaff

fore-and-aft topsail, gaff topsail - a triangular fore-and-aft sail with its foot along the gaff and its luff on the topmast

jib - any triangular fore-and-aft sail (set forward of the foremast)

lateen, lateen sail - a triangular fore-and-aft sail used especially in the Mediterranean

lugsail, lug - a sail with four corners that is hoisted from a yard that is oblique to the mast

mizen, mizzen - fore-and-aft sail set on the mizzenmast

sail, canvass, canvas, sheet - a large piece of fabric (as canvas) by means of which wind is used to propel a sailing vessel

spanker - a fore-and-aft sail set on the aftermost lower mast (usually the mizzenmast) of a vessel

spritsail - a fore-and-aft sail extended by a sprit

staysail - a fore-and-aft sail set on a stay (as between two masts)