Echinate is an adjective that describes something that is spiny or prickly, like a hedgehog or a porcupine. However, there are several synonyms that can be used instead of echinate, depending on the context. Some common synonyms include bristly, spiky, thorny, prickly, and barbed. Other less common synonyms include spinose, acicular, and stinging. Each of these synonyms carries slightly different connotations and nuances, so it's important to choose the most appropriate one for the situation. Whether describing a cactus or a crustacean, using the right synonym can help to convey the right tone and message.