There are numerous alternative expressions that can be used to replace the phrase "fall together". One such phrase is "coincide", which implies that two or more things occur at the same time or in the same place by chance. Additionally, "come together" can be effective to illustrate that things or people are uniting or converging for a specific purpose. Similarly, "converge" can also be used in a similar context. Moreover, the phrase "harmonize" can be utilized to indicate that elements or components are working well together, whereas "concur" suggests that two or more individuals or parties are agreeing on a particular topic or decision. Overall, there are numerous synonyms for "fall together", each with a slightly different connotation, which can add depth and variety to one's writing or speaking style.