Rhyme: correspondence of sound between words or the endings of words, especially when these are used at the ends of lines of poetry. Alliteration: the occurrence of the same letter or sound at the beginning of adjacent or closely connected words. Pun: a joke exploiting the different possible meanings of a word or the fact that there are words which sound alike but have different meanings. Oxymoron: a figure of speech in which apparently contradictory terms appear in conjunction.