Speech is the vocalised form of human communication. Vocalised: 1. To produce with the voice. 2. To give voice to; articulate: vocalize popular sentiment. A parade (also called march or marchpast) is a procession of people, usually organized along a street, often in costume, and often accompanied by marching bands, floats or sometimes large balloons. You can clearly see the difference between speech and action, surely? Or are you saying that as they're both forms of communication they're the same thing?