orderly

Concise Oxford English Dictionary © 2008 Oxford University Press:
orderly/ˈɔːdəli/

▶adjective

• 1 neatly and methodically arranged.

• 2 well behaved.

• 3 Military charged with the conveyance or execution of orders.

▶noun (pl. orderlies)

• 1 an attendant in a hospital responsible for cleaning and other non-medical tasks.

• 2 a soldier who carries orders or performs minor tasks for an officer.

– derivatives
orderliness noun.