Assonance is the repetition of vowel sounds to create internal rhyming within phrases or sentences, and together with alliteration and consonance serves as one of the building blocks of verse. Assonance is a rhyme, the identity of which depends merely on the vowel sounds. Thus, an assonance is merely a syllabic resemblance. For example, in William Butler Yeat's poem, 'The Wild Swans At Coole', Yeats rhymes the word "swan" with the word "stone". Simply put, assonance is "getting the rhyme wrong."
Assonance is a figure of speech that is found more often in verse than in prose. It refers to the repetition of vowel sounds to create internal rhyming within phrases or sentences. Literary works usually feature plenty of assonant words and sounds, as poets and writers try to make their words and phrases rhythmic. However, assonance differs from the basic rhyme. Assonance appears in poems in a subtle manner, not being too obvious to the reader. Famed American author and poet, Edgar Allan Poe is known for his mastery assonance and many of his works consist of perfect examples of this literary device.
Meaning: El Dorado is in reference to a stae of mind, not a place. Poe's El Dorado signifies the peace and happiness that one longs for in life. In the poem, one finds that ultimate happiness is not a destination to be reached, but instead a state of mind to be patient and wait for.