Dementia and Subnormality

Dementia noun - A serious mental disorder that prevents one from living a safe and normal life.

Subnormality and dementia are semantically related In some cases you can use "Subnormality" instead a noun "Dementia".

Subnormality noun - The state of being less than normal (especially with respect to intelligence).

Dementia and subnormality are semantically related in mental handicap topic. You can use "Dementia" instead a noun "Subnormality".