Which poetic device is used in line 10 of poe's the racen surcease of sorrow-sorrow for the lost lenore?

There is something grandiose about the word surcease as it rings of Milton, or Shakespeare, or even Yeats. The effort required to terminate sorrow, even as great as it may be, is usually an effort done in vain since there is little that can mitigate the shadows from one's heart.