Most lexical refers to something that pertains to the vocabulary or words of a language. Synonyms for this phrase can include language-based terms such as linguistic, lexicalized, lexicographic, and lexemic. Other potential synonyms for most lexical could include lexicon-based, vocabularian, dictive, and terminology-oriented. Depending on the context, the word lexeme might also be an appropriate synonym, as lexemes are the smallest units of language that carry meaning. Overall, there are a variety of different phrases and terms that one could use as a synonym for most lexical, depending on the specific focus or emphasis of the discussion.