Answer:
The unusual comparison found in 'Oread' is of sea with the forest.
Step-by-step explanation:
'Oread' is a short and famous poem written by Hilda Doolittle (H. D.)
The poem is just twenty-six words long written in six verses.
The poem is one of the most celebrated poem of the Imagist movement. The poem is full of imagery with simple sentences.
The unusual comparison that is found in the poem is of sea with the forest.
'Oread', in Greek mythology, is a nymph of a moutain or woods. So, the speaker (Oread) is addressing to the sea to 'whirl up its pointed pines'. In this the waves of sea is compared to the pines of trees found in forests. The same comparison is found in the third line, when the speaker is asking sea to splash the 'geat pines' which means great waves.
Another comparison found is in the line five when the speaker is asking the sea, which is denoted with blue color, to toss its green waves over the woods, which again is in the same comparative context as above.
The last line also compares the sea with forest, when the speaker is asking the sea to cover them with its 'pool of fir.'
So, the unusual comparison found in this poem is of sea with the forest.