Antonym of oxymoron

The word oxymoron is an oxymoron; 'oxy' comes from the Greek word that means 'sharp', while 'moron' comes from the word that means 'dull'. This means that politicians are dishonest, if the word 'politician' is opposite to 'honest'. A freezer could be warm if it was turned off or left open. It is made up of two or more that seem to be opposite to each other, or actually are opposite. You can have words that look opposite, but are right. Sometimes, the joke is just to say that a pair of words are an oxymoron. In each one, the one word looks like the opposite of the other word.