12-Letter Words Containing: A,B,O,R,S,S,T,U

• a policy of opposition to enlightenment or the spread of knowledge

• a deliberate act intended to make something obscure

• a contract assigning to another party some obligations of a prior contract

• arranged for contracted work to be done by others

• work under a subcontract; engage in a subcontract

• a mayor of a municipality in Germany or Holland or Flanders or Austria

• According to the World Meteorological Organization, a mid-level, principal cloud type, generally formless and dark grey in colour, which forms from altostratus occurring in layers at the middle altitude of the troposphere (usually above 2400 metres). Nimbostratus usually brings precipitation as the mid-level clouds thicken and subside into the low level of the troposphere. Frontal or cyclonic lift can also carry the top of a deep nimbostratus layer into the high levels of the troposphere. Also classified or characterized as multi-level; abbreviated Ns.

• a person who is deliberately vague

• an arithmetic operation in which the difference between two numbers is calculated

• the act of subtracting (removing a part from the whole)

• The state of being obscured.

• A unit of measurement used in particular for smoke detectors which respond to absorption of light by smoke, in percent absorption per unit length, e.g. % obs/ft, % obs/m.

• a person who practices masturbation