Can someone please tell me the difference with respects to linguistics, between 'Speed' and 'Velocity' ?
Here's my two cents.
It's from physics point of view.
A vector is a point of motion in space at any given time. It consists of two parts: a magnitude (the strength) and a direction.
The term 'speed' has a more loose definition. It means a point of motion in space at any given time with a magnitude (the strength) but without a direction. It's more general term for ordinary people.
Yes, I agree with Nefertiti. In physics, the difference is that velocity has direction as well as rate.
But once you get out of the physics classroom, there's not much difference to most people, except that "velocity" sounds "fancier."
I hesitated to reply because he seemed to be asking how these related to linguistics!? I was thinking, one more thing I'm not up to date on.