Swordtails are a popular species of freshwater fish that are known for their elongated tails that resemble a sword. They are commonly found in aquariums and are loved by fish enthusiasts for their vibrant colors and active personalities. If you are looking for synonyms for the word swordtails, there are a few different options you can consider. Some alternative names include Xiphophorus helleri, which is the scientific name for the species, and platy fish, which are similar in appearance but have a different tail shape. Other options might include names like mollies, guppies, or tetras, which are all other popular species of aquarium fish.