Tarragons are a herb that are often used in cooking due to their distinct anise-like flavor. If you're in a pinch and can't get your hands on tarragons, there are several synonyms that you can use as a substitute. One popular alternative is fennel, which has a similar anise flavor. Basil and parsley are also commonly used as a replacement for tarragons, as they both offer a fresh and herby flavor. Thyme and rosemary can also be used, but they offer a slightly different taste. No matter which replacement you choose, it's important to keep in mind that tarragons are a unique and flavorful herb that can't be fully replicated.