Dementia and Unbalance

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

Unbalance and dementia are semantically related in sane topic. In some cases you can use "Unbalance" instead a noun "Dementia", when it comes to topics like senility.

Unbalance noun - A lack of balance or state of disequilibrium.

Dementia and unbalance are semantically related in sane topic. You can use "Dementia" instead a noun "Unbalance", if it concerns topics such as insanity.