privateer

noun 0.629

letter of attorney

noun 0.553

charter

noun 0.550

merchant mariner

noun 0.547

recharter

noun 0.545

letter of credit

noun 0.544

merchantman

noun 0.533

merchant marine

noun 0.531

merchant ship

noun 0.530

marque

noun 0.529

barque

noun 0.525

merchant fleet

noun 0.518

licence

noun 0.516

letter of reference

noun 0.512

warrant

noun 0.511

marquis

noun 0.510

letter of credence

noun 0.509