The phrase 'most knowledgeable' can be expressed using several synonyms and related terms. Experts, scholars, authorities, mavens, and pundits are all words that can be used to describe people with extensive knowledge on a particular subject or discipline. Additionally, terms such as brilliant, intelligent, wise, and erudite can also be used synonymously with the term 'most knowledgeable'. Such terms describe people who have thorough knowledge, expertise, and competence in a particular area, and can be relied upon for their insight, understanding, and advice. Using different synonyms for the term 'most knowledgeable' can help add variety and depth to one's vocabulary, making communication more effective and engaging.