The antonyms for the word "invented" are "existing", "original", "real", "actual", "factual", "authentic", "genuine", "natural", and "true". While "invented" refers to something that is created or fabricated from scratch, these words indicate that the thing already exists, is not a product of imagination, and is not made up. Unlike "invented", these words imply that the thing is already out there and can be observed, experienced or proven to be true. The use of these antonyms depends on the context in which the word "invented" is being used, and it can help to enrich the language and convey more precise meanings.