pun a play on words. 
          
           
          riddle 
            a statement or proposition couched in mysterious way to create an 
            enigma, but to which there is an answer. 
          
           
           
          palindrome 
            a word or sentence or extended piece of writing that reads the same 
            way forward as backwards. 
          
           
           
          acrostic 
            a sequence of lines, the first letters of which when taken 
            separately constitutes a separate word. 
          
           
           
          oxymoron 
            a rhetorical figure by which contradictory terms are joined together 
            to give point to the statement. 
          
           
           
           
          tongue 
            twister words of a similar sound that induce difficulty in 
            articulating the sentence. rebus a represent-ation of objects by pictures 
            within a written sentence. 
          
          Frotz Eichenberg from Peter Piper's Practical Principles, click for more
           
           
           
           
          spoonerism 
            the transpositions of sounds, usually in a sentence, as in A well-boiled 
            icicle, A blushing crow, The Lord is a shoving leopard, Is the bean 
            dizzy ? Associated primarily with the Rev. William Archibald Spooner, 
            Warden of New College Oxford from 1903 to 1924. Spooner was seemingly 
            capable of the `acted' Spoonerism, pouring claret onto salt he had 
            spilt at dinner. 
          