velocity versus speed

Although there is a technical distinction between velocity and speed, there is a good reason to consider one of the senses of ‘velocity’ to be an emphatic synonym for ‘speed’, in ordinary language, namely, that in ordinary language ‘fast’, which is the (dominant) adjective form of ‘speed’, is often used to mean ‘soon’ (e.g., “His birthday is coming fast.”), and so something ‘fast’ might actually mean something that will happen soon. So, a ‘high-velocity’ item is unambiguous, but a ‘high-speed’ item is ambiguous.
keywords: terminology, physics