Monofilament refers to a single strand of filament or fiber. However, there are several synonyms that can be used to refer to the same entity. Some of these synonyms include wire, string, thread, cord, strand, and rope. Each of these words can be used depending on the context in which it is being used. For instance, wire and string are commonly used to refer to the same concept when talking about fishing lines and surgical sutures, respectively. On the other hand, rope and cord are more commonly used when referring to thicker and more durable strands, such as those used to secure boats or climb mountains.