Anagrams of: OMPEAR_

• a large hardwood drinking bowl

• complex system of paths or tunnels in which it is easy to get lost

• something jumbled or confused

• President.

• of greater importance or stature or rank

• greater in scope or effect

• greater in number or size or amount

• of the field of academic study in which one concentrates or specializes

• (of a scale or mode) having half steps between the third and fourth degrees and the seventh and eighth degrees

• of greater seriousness or danger

• of full legal age

• a commissioned military officer in the United States Army or Air Force or Marines; below lieutenant colonel and above captain

• British statesman who was prime minister from 1990 until 1997 (born in 1943)

• a university student who is studying a particular field as the principal subject

• the principal field of study of a student at a university

• of the elder of two boys with the same family name

• have as one's principal field of study

• a sudden event that imparts energy or excitement, usually with a dramatic impact

• strike suddenly and with force

• kill with or as if with a burst of gunfire or electric current or as if by shooting

• strike at with firepower or bombs

• cook or heat in a microwave oven

• a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

• of or relating to the null set (a set with no members)

• a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

• a mathematical element that when added to another number yields the same number

• the point on a scale from which positive or negative numerical quantities can be measured

• the sight setting that will cause a projectile to hit the center of the target with no wind blowing

• indicating the absence of any or all units under consideration

• having no measurable or otherwise determinable value

• indicating an initial point or origin

• adjust (an instrument or device) to zero value

• adjust (as by firing under test conditions) the zero of (a gun)

• a set of questions or exercises evaluating skill or knowledge