wordhoard
Vocabulary; the totality of words of a language or a person.
Wordiness is not usually considered a virtue any more than impurity is; but words are the wealth of English, and the riches of its word-hoard are only paralleled by the riches of the Anglo-American nations.
Thesaurus.
Where it comes from
A modern revival of Old English wordhord (“treasury of words”). Compare Dutch woordenschat, German Wortschatz. By surface analysis, word + hoard.
Adapted from the Wiktionary entry wordhoard (CC BY-SA 4.0).