Noncausal refers to an absence of causal relationship. Antonyms for noncausal are causal, related, interconnected, linked, associated, correlated, contingent, dependent, and consequential. These antonyms denote relationships between two or more factors where one leads to or affects the other. For instance, causal indicates the presence of a cause-and-effect connection, while related and interconnected signify an association between two entities. Correlated also means that two factors share a mutual relationship, while dependent and consequential denote that the presence of one factor dictates the outcome of the other. Therefore, these antonyms highlight the relationships between entities, which are absent in the case of noncausal.