DYFALU: A Welsh term for a form of fanciful conceit in which a string of sequential metaphors compares an object to a number of diverse things--often using compound words in a manner similar to the Anglo-Saxon or Old Norse kenning.
A comedy, in contrast to a tragedy, is a genre of drama in literature that is characterized by its happy and vivacious ending. Besides making the audience happy, a comedy rather importantly intends to evoke humour and amusement in the audience by means of extensive laughter.
A libretto is distinct from a synopsis or scenario of the plot, in that the libretto contains all the words and stage directions, while a synopsis summarizes the plot.