neurosis noun (plural neuroses ) Medicine a relatively mild mental illness not caused by organic disease,

involving depression, anxiety, obsessive behaviour, etc. but not a radical loss of touch with reality.

psychosis noun (plural psychoses ) a mental disorder in which thought and emotions are so impaired that

perception of external reality is severely affected.

amnesia noun a partial or total loss of memory.

paranoia noun 1 a mental condition characterized by delusions of persecution, unwarranted jealousy, or exaggerated

self-importance. 2 unjustified suspicion and mistrust of others.