Hydromorons complement oxymorons. (H and O are two extremes on the chemical reactivity or redox scale.) In contrast to the glaring self-contradiction of an oxymoron, a hydromoron is a glaring redundancy like each of the three pairs in this telling headline.
Word Ways: Vol. 44
, Article 26.
Available at: http://digitalcommons.butler.edu/wordways/vol44/iss3/26