A word for something very ugly, with the pattern e_e_o_e, is eyesore. The first known use of the word 'eyesore' was in 1530, but the origin is Middle English 1250–1300. Some synonyms are fright, horror, mess, monstrosity, and sight.
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Speaking of an eyesore, a Devon farm who turned down £1.4 million to have an ugly wind turbine on his land is still faced with looking at it after his neighbour accepted the offer. He describes the "energy creator" as a threat to an “oasis of peace and wonder”. Learn more from Express.