Disposition
A synonym for temper is temperament.
Personality, inclination, temperament, arrangement, classification, organization...
feeling
I think you meant disposition which means arrangement or movement of something.
The synonym is character. An antonym could be robotic, wooden, or unfeeling... flat affect in psychological terms.
The wild animal had a bad temperament. She had a very good temperament.
A temperament refers to aspects of a person individuality on personality
The man had a very irritated temperament.
If you do not say who they are, we cannot say what their temperament is like.
The Artistic Temperament was created in 1919.
temperament.
Well temperament and equal temperament are two tuning systems in music theory. Well temperament allows for each key to have its own unique sound quality, while equal temperament divides the octave into 12 equal intervals. Well temperament was used before equal temperament became popular, providing more variety in tonal colors, while equal temperament allows for easier modulation between keys but sacrifices some of the unique qualities of each key.