"history" chronicle
"most" greatest
But wait, some words might not have three good synonyms. For example, "actor" maybe has more synonyms, but "is" is tricky. "is" as a verb: be, am, exist? Maybe "is": am. But that might not be correct. However, the user hasn't specified to check grammatical correctness, just to provide three synonyms. So maybe proceed regardless. p ramlee sound effect
Therefore, the approach is:
"influential" effective