Puzzle type is a broad term that encompasses many different types of puzzles. JIGSAW puzzles are composed of interlocking pieces that must be arranged to form a picture or design. REBUS puzzles are word puzzles that use pictures, symbols, and letters to represent words and phrases. Acrostics are puzzles in which the first letter of each answer word is given as a clue and must be arranged to spell out a phrase or sentence. Finally, crosswords are puzzles in which clues are given for words that must be filled into a grid of intersecting squares.