For questions about attacks. An attack is an action that can be taken by a vast number of entities that either can cause damage, a debilitation of some sort, or both, though specific RPGs may define the term more specifically.
It seems to me that attack-roll should be covered already by attack, so I don't see a use for having attack-roll be its own thing. So I'm putting this forward for community discussion.
Not all questions tagged attack include an attack-roll. Generally, we have a subset of specific questions explicitly about attack roll calculations or attack-roll interactions with other parts of respective game engines that are distinct enough from the broad category of the attack tag.
Until someone demonstrates that the more specific attack-roll causes confusion or other issues, there is no need to lose utility by merging a more specific distinct tag with a less specific one.