Background: I was hoping to use Enhance Ability and its Bear's Endurance option to speed up our travelling a bit. But now I am not sure if it will work, hence this question.
Enhance Ability – Bear's Endurance lasts for 1 hour with concentration, and gives advantage on constitution checks (also 2d6 temp HP, but that's not relevant here). It does not specify "ability check", just "check".
Things like forced march, spell concentration and holding your breath actually call for constitution saving throws (see this related queston).
Does Enhance Ability help with saving throws?
In other words, is Bear's Endurance useful for the above, or does it only help with constitution ability checks (of which there are precious few, it's almost always a saving throw)?
Best Answer
Enhance Ability only works on ability checks. Ability checks are not saving throws. Enhance Ability does not help with saving throws.
Enhance Ability enhances, well, abilities...
These are all ability checks for a specific ability. Note that even in the rules for ability checks it calls it a "Charisma check" not a "Charisma Ability check". If a game feature is taking about ability checks in general (e.g. the Guidance spell) then yes, they are called "ability checks" because it's not relating to a specific ability.
Nowhere in the saving throw rules does it refer to them as being checks and this is also reinforced in the Sage Advice Compendium: