That's it. Not much more detail in the question.
If the answer could include usage in a sentence, that would be helpful.
They're exactly the same word. In Arabic, the word صلاة (salah/salat) ends with what is known as a taa marbutah, which can be pronounced either as "t" (if it's in the middle of a sentence) or an "h" (if it's at the end of a sentence).
It is exactly the same, depending on the context of usage. At the end of iqama we use "salah", and in the middle we use "salat".
Basically according to my info. As much as I can remember, there wouldn't be any special difference between the mentioned words (Salah/Salat) from the aspect of meaning and their meanings almost are the same. But apparently there is a little difference from grammar aspect.