What do we call a combination of contradictory words, like "controlled chaos"?

A combination of contradictory words is known as an oxymoron. This term describes a figure of speech in which two seemingly opposing or contradictory elements are brought together to create a unique or thought-provoking expression. "Controlled chaos," for instance, illustrates the coexistence of order and disorder, prompting the listener to reconsider conventional understandings of those terms.

In contrast, a paradox involves a statement that seems self-contradictory but may reveal a deeper truth, while antithesis is a rhetorical device that contrasts different ideas or concepts within a balanced grammatical structure. An anomaly refers to something that deviates from what is standard, normal, or expected, rather than the juxtaposition of contradictory terms. Therefore, the correct choice effectively captures the essence of this linguistic phenomenon.