Geckos are a type of lizard that are known for their unique appearance and their ability to climb walls and ceilings. Some common synonyms for geckos include salamanders, lizards, chameleons, and skinks. Salamanders are similar to geckos in appearance, with long tails and smooth skin. Lizards are a broader category of reptiles that includes geckos as well as many other species. Chameleons are another type of lizard that are known for their ability to change color. Skinks are a type of lizard that are similar to geckos in appearance and behavior, but are typically larger and more aggressive. Overall, there are many different types of lizards that could be considered synonyms for geckos depending on the context.