When it comes to communicating with someone after missing their call, there are multiple synonyms for the term "phone back". One common phrase is "return the call". Other popular options include "call back", "ring back", and "dial again". Additionally, "get in touch with" or "reach out to" can be used to imply a phone conversation. In formal settings, "returning the phone call" may be more appropriate. Regardless of which phrase is used, the goal remains the same - reconnecting with someone and continuing a conversation that was previously interrupted.