"Looked back" is a phrase means to reflect on a past event, or to remember something from the past. There are several synonyms which can be used in place of "looked back". Some of these include "reminisced", which means to remember and talk about past experiences with fondness. "Recalled" can also be used which means to bring back a past event or memory into one's mind. "Retrospected" refers to introspection, analyzing past choices and decisions for personal development. "Revisited" means to go back to a previous place or experience. All these synonyms can be used in place of "looked back," depending on the context and the tone of the narrative.