The phrase "in consonance" refers to two or more elements being in agreement or harmony with one another. There are several synonyms that can be used to convey a similar meaning, including "in accordance," "in sync," "in alignment," "in harmony," and "in agreement." Each of these phrases implies that all the elements involved are working together towards a common goal or objective without any conflict or opposition. Using synonyms for "in consonance" can help add variety and nuance to writing, allowing writers to express the same idea in different ways for better impact.