Closed book
Closed book noun - Something hard to understand or explain.
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Synonyms for Closed book
Magic number and closed book are semantically related. In some cases you can use "Magic number" instead a noun phrase "Closed book".
Magic number
Magic number noun - The atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126.
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Synonyms for Magic number
Closed book and magic number are semantically related. Sometimes you can use "Closed book" instead a noun phrase "Magic number".
Mutual synonyms
Related pairs
- riddle and closed book
- riddle and magic number
- oracle and closed book
- oracle and magic number
- secret and closed book
- secret and magic number
- puzzle and closed book
- puzzle and magic number
- occult and closed book
- occult and magic number
- enigma and closed book
- enigma and magic number
- mystery and closed book
- mystery and magic number
Cite this Source
Magic number and Closed book. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/closed_book/magic_number
Closed book & Magic number. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/closed_book/magic_number>.
Magic number or Closed book. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/closed_book/magic_number.
Google Ngram Viewer shows how "closed book" and "magic number" have occurred on timeline