The phrase "sits well with" is often used to indicate a sense of agreement or compatibility between two things. There are several synonyms for this phrase that can be used to convey the same meaning. "Agrees with," "harmonizes with," and "meshes with" are all examples of alternative ways to express the idea of something fitting well or being in alignment with something else. Other possible synonyms may include "aligns with," "matches with," or "complements." Using different synonyms can help to add variety and nuance to your language, making your writing or conversation more engaging and expressive.