What are the opposite words for facade?

Facade is a word that means the front exterior of a building, or the outward appearance of something or someone. Antonyms, on the other hand, are words that have opposite meanings or are contradictory in nature. So, for the word facade, the antonyms could be honesty, reality, authenticity, genuineness, or truthfulness. These words denote the opposite of what facade represents, which is usually used to hide the true nature of something or someone. In essence, antonyms for facade refer to the things that are real, sincere, and without any pretense or misleading.