Question

What poetic device is used in Poe's " The Raven," "surcease of sorrow- sorrow for the lost Lenore?"

Answer 1

Answer:

1)  alliteration — refer to:  "surcease of sorrow—sorrow.." ; AND:
                                             "lost Lenore" .

as well as:

2) repetition — refer to:  "sorrow —  sorrow..."  .
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Answer 2

The poetic device used is alliteration because of the repetition of the first letter in each word throughout the line.