Strong denial is a declaration that someone did not commit or participate in a specific action or behavior. There are several synonyms that can be used to convey the same meaning, including refusal, rejection, repudiation, defiance, contradiction, negation, and rebuttal. Refusal involves categorically saying no to an accusation or request, whereas rejection is a stronger form of refusal, emphasizing the inadmissibility of the accusation or request. Repudiation involves a complete denial of involvement, often accompanied by a strong condemnation of the accusation or offense. Defiance involves a refusal to acknowledge the accusation or comply with the request, while contradiction is an assertion that what is being claimed is false. Negation is a straightforward denial, while rebuttal is a more detailed refutation of evidence or factual claims.