When it comes to the phrase "tried hardest", there are many different words that can be used as synonyms. Some options may include words such as "strived", "endeavored", "worked diligently", "exerted oneself", "pushed oneself", "labored", "applied oneself", "exhausted one's efforts", "gave it one's all", "put forth a valiant effort", "fought tooth and nail", "did everything possible", "left no stone unturned", and "poured one's heart and soul into". Each of these words highlights the dedication and persistence of someone who has truly put their all into achieving a goal.