The word "un-realities" refers to things that are not genuine or true. The antonyms for this word would be reality, truth, authenticity, genuineness, validity, realness, and actuality. These words are used to describe things that are factual and exist in the real world. Reality is the opposite of un-reality because it denotes the actual state of things as they exist, without any fabrication or distortion. Authenticity refers to the genuineness of something, while validity is used to describe things that are based on sound reasoning or evidence. Realness, on the other hand, signifies the tangible existence of something, while actuality refers to the real-world existence of things.