The opposite of an oxymoron is a tautology. While an oxymoron combines two contradictory terms to create a paradoxical effect, a tautology repeats the same idea in different words, often leading to redundancy. For example, the phrase “free gift” is a tautology because a gift is inherently free.
In summary, while an oxymoron juxtaposes opposing ideas, a tautology reinforces the same idea, making them conceptual opposites.