The word "un-truism" refers to a statement that is incorrect or untrue. Some synonyms for this word can include fallacy, misconception, falsehood, falsehood, and misbelief. These words are often used to describe a statement that is believed to be true, but is actually incorrect. The use of synonyms for "un-truism" can help to clarify the meaning of a particular statement and ensure that it is accurately understood. It is important to recognize when a statement is an un-truism, as this can help prevent the spread of misinformation and promote more accurate and reliable information.