Aetiologic, also spelled as etiologic, refers to the study of the causative factors or origins of diseases or disorders. Synonyms for this word include causal, causative, and causological. Other options include etiological, which is simply an alternate spelling of aetiologic, and pathogenic, which refers more specifically to the factors that cause a disease to develop. Some other related terms that could be considered synonyms for aetiologic include investigative, explanatory, and elucidative, all of which suggest an effort to understand the underlying causes or mechanisms of a given condition. Overall, synonyms for aetiologic would be words that relate to determining the causative factors of a disease or disorder.