All closed book synonyms

noun closed book

• puzzle — a toy, problem, or other contrivance designed to amuse by presenting difficulties to be solved by ingenuity or patient effort.
• brain-teaser — a puzzle or problem whose solution requires great ingenuity.
• riddle — a coarse sieve, as one for sifting sand in a foundry.
• mystery — anything that is kept secret or remains unexplained or unknown: the mysteries of nature.
• conundrum — A conundrum is a problem or puzzle which is difficult or impossible to solve.
• subtlety — the state or quality of being subtle.
• question — a sentence in an interrogative form, addressed to someone in order to get information in reply.
• secrecy — the state or condition of being secret, hidden, or concealed: a meeting held in secrecy.
• thriller — a person or thing that thrills.
• dilemma — a situation requiring a choice between equally undesirable alternatives.
• puzzle — a toy, problem, or other contrivance designed to amuse by presenting difficulties to be solved by ingenuity or patient effort.
• quandary — a state of perplexity or uncertainty, especially as to what to do; dilemma.
• complexity — Complexity is the state of having many different parts connected or related to each other in a complicated way.
• puzzlement — the state of being puzzled; perplexity.
• poser — wannabe, pretentious person
• mystification — to perplex (a person) by playing upon the person's credulity; bewilder purposely.
• problem — any question or matter involving doubt, uncertainty, or difficulty.
• why — for what? for what reason, cause, or purpose?: Why did you behave so badly?
• brain-teaser — a puzzle or problem whose solution requires great ingenuity.
• perplexity — the state of being perplexed; confusion; uncertainty.
• stickler — a person who insists on something unyieldingly (usually followed by for): a stickler for ceremony.
• cliffhanger — A cliffhanger is a situation or part of a play or film that is very exciting or frightening because you are left for a long time not knowing what will happen next.
• twister — a person or thing that twists.
• occult — of or relating to magic, astrology, or any system claiming use or knowledge of secret or supernatural powers or agencies.
• cryptogram — a secret symbol
• crux — The crux of a problem or argument is the most important or difficult part of it which affects everything else.
• difficulty — the fact or condition of being difficult.
• charade — If you describe someone's actions as a charade, you mean that their actions are so obviously false that they do not convince anyone.
• oracle — Oracle Corporation
• stumper — a person or thing that stumps.
• abstruseness — hard to understand; recondite; esoteric: abstruse theories.
• grabber — a person or thing that grabs.
• whodunit — a narrative dealing with a murder or a series of murders and the detection of the criminal; detective story.
• chiller — A chiller is a very frightening film or novel.
• teaser — a person or thing that teases.
• inscrutability — incapable of being investigated, analyzed, or scrutinized; impenetrable.
• sphinx — a figure of an imaginary creature having the head of a man or an animal and the body of a lion. (usually initial capital letter) the colossal recumbent stone figure of this kind near the pyramids of Giza.
• rune — a poem, song, or verse.
• rebus — a representation of a word or phrase by pictures, symbols, etc., that suggest that word or phrase or its syllables: Two gates and a head is a rebus for Gateshead.
• strait — Often, straits. (used with a singular verb) a narrow passage of water connecting two large bodies of water.
• plight — Archaic. pledge.
• complication — A complication is a problem or difficulty that makes a situation harder to deal with.
• doubt — to be uncertain about; consider questionable or unlikely; hesitate to believe.
• maze — a confusing network of intercommunicating paths or passages; labyrinth.
• labyrinth — an intricate combination of paths or passages in which it is difficult to find one's way or to reach the exit. Synonyms: maze, network, web.
• confusion — If there is confusion about something, it is not clear what the true situation is, especially because people believe different things.
• distraction — the act of distracting.
• predicament — an unpleasantly difficult, perplexing, or dangerous situation.
• bewilderment — Bewilderment is the feeling of being bewildered.
• intricacy — intricate character or state.