Sentence:  The Advisory Committee on Antarctic Names (ACAN), when it was established in 1943 as the Special Committee on Antarctic Names (SCAN), faced the monumental problem of bringing order into the <WSD>chaotic</WSD> geographic nomenclature of a vast, inaccessible, inhospitable continent more expansive than the United States, most of it unseen by man at that time. ... In less than two decades, <WSD>chaotic</WSD> confusion with bitter controversy over names in the Antarctic was resolved into an orderly nomenclature largely agreed upon internationally. 
Meaning of the word marked with <WSD> tags:  Extremely disorganized or in disarray.