When it comes to describing the impact of something, using the same phrase repeatedly can risk becoming monotonous. To avoid this, there are different synonyms that can be used instead of the phrase "had an effect on". Some of these synonyms include "influenced", "impacted", "altered", "modified", "changed", "affected", "transformed", "shaped", "molded", and "shook up". Each of these words conveys a slightly different nuance, enabling writers to choose the best word that suits their intended meaning. With these synonym options, writers can add variety and precision to their writing, making it more interesting and engaging to readers.