SynonymDefinitionAntonym.com - English Synonym Dictionary

An extremely steep face

A cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point

A Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting

A straight line at right angles to another line

Intersecting at or forming right angles

At right angles to the plane of the horizon or a base line

So steep as to be nearly veritcal