The phrase "contradiction in terms" refers to a situation where two words or phrases are used together, but they have opposite or incompatible meanings. Here are a few synonyms for this phrase:
1. Oxymoron: A combination of words that contradict each other. For example, "jumbo shrimp" or "civil war".
2. Paradox: A statement that appears to be contradictory or absurd, but may be true in some sense. For example, "less is more" or "I can resist anything except temptation".
3. Incongruity: A lack of harmony or agreement between two things. For example, a serious topic being discussed in a lighthearted manner.
4. Antithesis: A contrast or opposition between two things. For example, "love and hate" or "good and evil".