Question about terminology for lesser X-risks and S-risks

I have a question for the EA community about the terms ‘X-risk’ and ‘S-risk’, and terms for the same kinds of risk that occur with lower stakes.

The Centre for the Study of Existential Risks front page states ‘We are dedicated to the study and mitigation of risks that could lead to human extinction or civilisational collapse.’ Since ‘existential’ is defined as ‘relating to existence or being alive’, I think it logically follows that an existential risk is ‘a risk to existence or being alive’. I believe the majority of people would understand the essence of what an existential risk is after hearing the term, without having been provided with a definition.

The Center for Reducing Suffering states, in various places on its website, that a suffering risk or S-risk is a risk that a circumstance will cause an ‘astronomical’ or ‘unimaginable’ amount of suffering. I don’t think it logically follows from the name ‘suffering risk’ that this term is referring to an astronomical or unimaginable amount of suffering, as opposed to some undefined amount of suffering. The word ‘suffering’ is not naturally superlative in the way ‘existential’ is, but it’s elevated to this position in the term ‘suffering risk’.

If I was to write about a potential future meteor impact on Earth, I could distinguish between ‘the expected outcome is widespread destruction’ and ‘the expected outcome is the extinction of humanity’ by using the terms ‘catastrophic risk’ or ‘existential risk’ respectively. But if I was to write about the factory farming of aliens, I can’t think of a term that describes a risk of ‘some undefined amount of suffering that is worth consideration’ as opposed to ‘an astronomical or unimaginable amount of suffering’.

Is anyone aware of such a term that is currently in use? I’d really like to hear about it or be directed to resources about it or other instances of its use. Alternatively, if you think the question is stupid or there is something wrong with my definitions or interpretation, that would also be really useful information for me and I hope you will comment either way :)