assonance
noun
                                                                                                                            
                                                            as·so·nance
                    
                                                                                                              
                                                                                                                                  ˈa-sə-nən(t)s  
                                                      
                                                          
            1
                    
        a
    
          
                                          
              
          
                                                      : relatively close juxtaposition of similar sounds especially of vowels (as in "rise high in the bright sky")                                      
                
                    
        b
    
          
                                          
              
          
                                                      : repetition of vowels without repetition of consonants (as in stony and holy) used as an alternative to rhyme in verse                                      
                
                    
2
                    
                                          
              
          
                                                      : resemblance of sound in words or syllables                                      
                
                    
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  Merriam-Webster unabridged




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