An anagram is a word formed by rearranging all the letters of another word, using each letter exactly once. These words use every letter from "SRLNFPGIU":
A line led from a vessel's quarter to her cable so that by tightening or slacking it she can be made to lie in any desired position; a line led diagonally from the bow or stern of a vessel to some point upon the wharf to which she is moored.