【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.