The antonyms for the word "alphabetised" are disordered, unclassified, disorganized, unarranged, chaotic, haphazard, and non-systematic. These antonyms indicate the absence or lack of systematic arrangement or organization of items, particularly in alphabetical order. For instance, if a document or a book is disorganized, it means that the contents are not in order, which makes it difficult to locate a specific item easily. Similarly, if a list or a menu is haphazard, it means that it has no logical order whatsoever. Therefore, the antonyms of alphabetised signify the opposite of the systematic and logical arrangement of items in alphabetical order.