Good temper is a state of emotional stability where a person is calm, patient and kind. There are several synonyms for the word "good temper". One of the most common synonyms is "good-natured", which refers to a person who is friendly and easy to get along with. Another synonym is "amiable", which describes a person who is pleasant and agreeable to be around. "Equable" is also a synonym for good temper, referring to someone who is even-tempered and doesn't get upset easily. Additionally, "affable" and "genial" are synonyms that describe a person who is warm and friendly. All of these synonyms express a positive personality trait that is valued in social interactions.