Nihilistic delusion and Psychotic belief

Nihilistic delusion noun - The delusion that things (or everything, including the self) do not exist; a sense that everything is unreal.

Psychotic belief and nihilistic delusion are semantically related. In some cases you can use "Psychotic belief" instead a noun phrase "Nihilistic delusion".

Psychotic belief noun - (psychology) an erroneous belief that is held in the face of evidence to the contrary.

Nihilistic delusion and psychotic belief are semantically related. Sometimes you can replace phrase "Nihilistic delusion" with "Psychotic belief", this phrases are similar.