The word "un-natural" refers to something that is not normal, not found in nature or that goes against the laws of nature. Synonyms for this word include artificial, counterfeit, fake, fabricated, bogus, spurious, synthetic, simulated, insincere, and contrived. These words convey a sense of something that is not genuine, but rather a contrived imitation or an attempt to deceive. Some synonyms for "un-natural" can also imply a sense of something that is morally wrong or bad, such as insensitive, inhumane, unethical, or immoral. It is crucial to choose the appropriate synonym based on the context to accurately convey the intended meaning.