The result of subtraction is called "difference". At first glance it might seem that it shouldn't cause an ambiguity over the value denoted by this word; until we stumble upon subtractions that produce negative results.
What do I actually mean? It is clear that:
2 − 5 = −3
But when we say "the difference between 2 and 5" don't we mean "3" in the first place irrespective of the order in which we place the numbers in the sentence? What expression should we use to make it clear, regardless of the context, that we imply "−3"?