When it comes to using the phrase "responded to," there are a variety of synonyms that can be utilized to spice up your writing. For example, "replied to," "answered," "acknowledged," "reacted to," and "retorted" are all options. Other possibilities include "countered," "addressed," "delivered a response," "made a reply," and "commented on." Each synonym brings a slightly different connotation to the phrase, so it's important to choose the one that best fits the situation and tone of your writing. Experimenting with different synonyms can add depth and nuance to your communication.