The papers formed a disorganized pile on the desk.
haphazard collection
Frequency:
45
%
The shelves held a haphazard collection of books.
unordered list
Frequency:
40
%
The items on the list were in an unordered sequence.
Idiomatic Expressions for orderless
Phrase: chaotic order
Meaning: a seemingly disorganized or random arrangement that still has a structure or pattern
Usage: The artist's paintings may seem chaotic at first glance, but there is a chaotic order to his work.