That is not existential or nihilist in the least.
The problem of existential import.
This is the Existential Negation Campaign.
The breadth of this article is on existential risks.
The existential fallacy is a syllogistic fallacy.
As such, it lies at the nexus between the sublime and the existential.
In the sense of explaining alternations of existential and universal, that is.
Frankl was one of the key figures in existential therapy.
At the steelworks he read existential literature in the crane cabin.
It publishes the Journal of the Society for Existential Analysis twice a year.