12-Letter Words Starting: SUP

• a broad highway designed for high-speed traffic

• an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form

• The shape formed by a helix which in turn is twisted into a larger helix

• (of e.g. an engine) having the power increased by fitting with a supercharger

• fraught with great emotion

• humbly entreating

• A field theory combining supersymmetry and general relativity.