Aberration, derangement, alienation, as here compared, denote mental disorder.
Aberration while usable to designate any form of mental unsoundness typically denotes a minor or transitory disorder insufficient to constitute insanity.
- Single people are treated as an aberration and made to pay a supplement.
Derangement applies to any functional mental disturbance whether permanent or not.
- There is no proof that they are suffering from any mental derangement.
Alienation implies an estrangement from a normal or usual mental or emotional state and in forensic use specifically denotes a becoming or being insane.
- Her sense of alienation from the world disappeared.