rearrangement

re- +‎ arrangement or rearrange +‎ -ment

rearrangement (countable and uncountable, plural rearrangements)

1. The process of rearranging.
   • 1951 January, R. A. H. Weight, “A Railway Recorder in Essex and Hertfordshire”, in Railway Magazine, page 44:

     They form part of the vast electrification and reconstruction schemes which have been in hand for a number of years at Liverpool Street, and in suburban Essex, and include the rearrangement of tracks, of which the Ilford flyover forms part; the modern signal boxes, now needed only at key points; the electric control or sub-stations; and a large electric car shed.

2. (chemistry) A rearrangement reaction.