All riled up is a phrase commonly used to describe someone who is agitated, excited or angry. There are several synonyms that can be used to replace this phrase. They include getting worked up, in a tizzy, steamed up, bothered, heated, upset, or fired-up. Each of these words has its unique connotation and context of use. For instance, "getting worked up" can be used to describe someone who is getting overly emotional about an issue, while "steamed up" can be used to describe someone who is visibly angry. In any case, the right synonym to replace "all riled up" depends on the intensity and nature of the situation.