Synonyms for "vocabulary": mother tongue, speech, second language, terminology, body language, locution, phrase, cant, term, idiom, tag, dictionary, sign, phrasing, label, argot, nomenclature, turn of phrase, corpus, expression, alphabet, register, spelling, slang, grammar, voice, construction, glossary, syntax, parlance, punctuation, jargon, etymology, book, rhetoric, phraseology, semantics, wording, stylistics, lingo, philology, delivery, reference book, thesaurus, index, writing, store, patois, storehouse, style, treasury, language, knowledge, usage, lore, vernacular, range, shibboleth, reach, wordbook, resource, lexicon.