Dyer's rocket is a plant that has many synonyms, including weld, dyer's weed, yellow weed, and woad-waxen. This plant is known for producing a yellow dye that has been used for centuries in the textile industry. Other plants that produce yellow dyes include goldenrod, marigold, and chamomile. Dyer's rocket can also refer to a rocket ship or missile that is used for space exploration or military purposes. The synonym for this meaning of dyer's rocket is simply rocket. Overall, the term dyer's rocket can refer to a plant or a weapon, depending on the context.