Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| acrostic | a poem or puzzle in which the first (or last) letters of each line spell a word or sentence. |
| alphametic | a popular mathematical puzzle in which numbers are replaced by letters forming words. |
| brainteaser | something (as a puzzle) that demands mental effort and acuity for its solution. |
| conundrum | (Lat.) a riddle, esp one whose answer is a play on words. |
| crossword | a type of puzzle in which a square with blank spaces is to be filled with letters. |
| cruciverbalist | a designer or afficionado of crossword puzzles. |
| enigma | (Greek) a riddle, a puzzle. |
| kakuro | a kind of logic puzzle, resembling a mathematical crossword. |
| logogriph | a riddle in which a word is found from other words' letters. |
| logogriphic | like a logogriph, a riddle in which a word is found from other words' letters. |
| pusle | (Obs.) a puzzle; (verb) to puzzle. |
| puzzledom | the domain of puzzles; puzzles, collectively. |
| rebus | (Lat.) a representation of syllables or words by means of pictures or symbols; also, a riddle made up of such pictures or symbols. |
| riddler | one who poses riddles. |
| solutionist | a solver, as of puzzles. |
| sudoku | a type of puzzle in which numbers must be entered into a square grid in such a way that no number is repeated in any row, column or internal square. |
| tangram | a Chinese geometrical puzzle consisting of a square cut into seven pieces which can be combined to make various shapes. |
| unpuzzle | to work out the obscured meaning of. |
| unriddler | one who unriddles. |
| wordsearch | a type of word puzzle. |