The term 'Trident Alternative' can be broken down into three crossword solutions: ORBIT (5 letters), DENTYNE (7 letters), and PALISADES (9 letters). ORBIT is a word used to describe the path of a celestial body around another, such as a planet orbiting the sun. DENTYNE is a brand of chewing gum that was first introduced in 1899. PALISADES is a term used to describe a line of steep cliffs or rocks, often found along a coastline. Together, these three words provide an alternative to the Trident missile system, which is a submarine-launched ballistic missile system developed by the United States.