"Dedicated to" is a phrase that connotes determination, devotion, and loyalty towards a person, cause, or concept. There are several synonyms that can be used to convey the same idea effectively. "Committed to" implies one's unwavering support and dedication towards a particular goal or purpose. "Devoted to" shows a deep love, loyalty, and commitment towards a person, activity, or idea. "Focused on" indicates one's strong emphasis on a specific aspect or objective while "loyal to" indicates an unyielding allegiance towards someone or something. "Adhering to" is another suitable substitute that represents one's adherence to a particular set of principles, values, or beliefs.