When the words are completed, there will be ten letters in the grid not used by the words—one in each column. In the bottom row write the next letter of the alphabet after the unused letter in that column; it will spell out another pirate term.
E | N | G | N | T | R | E | A | D | A |
A | R | R | I | X | O | H | S | N | N | I | B | E | K | N | R | R | U | A | Q |
O | O | P | I | P | Q | E | F | D | N |
T | P | K | O | T | T | A | P | E | A |
Y | A | R | R | H | C | N | E | Y | B |
From Mensa Puzzle Calendar 2017 by Mark Danna and Fraser Simpson, Workman Publishing, New York. Puzzle for September 19.