When two people are "getting along well," there are several synonyms that can be used to describe their relationship. One option is "clicking," which suggests that they have found a natural connection with each other. Another synonym is "meshing," which emphasizes the compatibility of their personalities and interests. Similarly, "jiving" suggests that they are in sync with each other and share a similar outlook on life. Other synonyms for "getting along well" include "gelling," "harmonizing," and "vibing." Each of these words captures the sense of mutual understanding and connection that characterizes a positive relationship between two people.