Wordbook

Noun

1. A reference book that lists words.
2. A dictionary.
3. A reference book that focuses mainly on lexicon (vocabulary), spelling, and (sometimes) syllabication, but with little to no information about definitions, synonyms, history, or usage.<!--Such books were useful and salable in the pre&#x2D;web era but are poorly salable now and thus mostly no longer developed by publishers.-->
4. The libretto of an opera.