Anagrams of: ABBCMOR_

• trees of chiefly South America

• a freight car with roof and sliding doors in the sides

• a male monarch or emperor (especially of Russia prior to 1917)

• a person having great power

• annoyed and irritable

• upright consisting of a vertical side member of a door or window frame

• alternatively, a member of the family Nymphaeaceae; a small genus of American aquatic plants

• flat-topped or convex inflorescence in which the individual flower stalks grow upward from various points on the main stem to approximately the same height; outer flowers open first

• 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

• Cousin (usually as a term of address)

• Because

• someone who drives a taxi for a living