"Pale malt" and "2-row" are often used to describe the same thing, in those cases it would indeed be interchangeable because it is the same thing.
"Pale Malt" and "Pale Ale Malt" aren't necessarily interchangeable. You could probably sub one for another in a recipe and be in the same ballpark, but the base malt character will be different (possibly a lot different). Base malt is different than specialty malts in that even 1 degree Lovibond is enough to give a significant difference in flavor. Pils, Pale, Pale Ale and Vienna are all within a couple of degrees L of each other, but they all result in different beers if used as the base malt.