Which type of literary device does Coleridge use in the lines “Huge fragments vaulted like rebounding hail, Or chaffy grain beneath the thresher’s flail?” alliteration paradox personification simile

Simile.

It is a rhetorical analogy between two concepts where the comparative part consists of one of the words:

The purpose of the simile is to reveal new, important, predominant properties for the subject of the statement in the object of comparison. One of the distinguishing features of the simile is the mention of both objects being compared, while the common feature is not always mentioned.

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Simile

Explanation:

“Huge fragments vaulted like rebounding hail, Or chaffy grain beneath the thresher’s flail?”

For Comparing using "as" or "like" , we use a simile. So, here the literary device is simile.

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