15-Letter Words Containing: A,Y,I,S,T,S,_

• the mental representation of sexual activities

• a therapist who deals with mental and emotional disorders

• the branch of psychiatry concerned with psychological methods

• the treatment of mental or emotional problems by psychological means

• a stabilizer consisting of a heavy gyroscope that spins on a vertical axis; reduces side-to-side rolling of a ship or plane

• systematic organization; the act of organizing something according to a system or a rationale

• surgical interruption of a nerve pathway in the sympathetic nervous system

• A 150-year anniversary.

• The scientific study of all the psychological interactions between humans and the world of sound; includes the perception and production of speech.