How Do You Say Someone Has A Good Vocabulary?

How Do You Say Someone Has A Good Vocabulary? articulate, eloquent, fluent, silver-tongued. What is a person with good vocabulary called? Good vocabulary: Eloquent, well-versed, well-spoken, erudite, articulate. Poor vocabulary: linguistically challenged, inarticulate. How do I say I have a big vocabulary? Use the adjective sesquipedalian to describe a word that’s very long and multisyllabic.