The word Uum may mean:
- UUM is an abbreviation of University of Ulster's, Magee College.
- UUM is an abbreviation of Universiti Utara Malaysia, the Northern University of Malaysia, Kedah, Malaysia.
- The US Military designation for a submarine-launched, anti-submarine guided missile. Examples include the UUM-44 SUBROC missile and the UUM-125 Sea Lance.
- -UUM a Latin suffix