normal vs perpendicular perpendicular vs normal

normal and perpendicular both are nouns.

normal and perpendicular both are adjectives.

normal (noun) perpendicular (noun)
something regarded as a normative example a straight line at right angles to another line
a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
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
an extremely steep face
normal (adjective) perpendicular (adjective)
conforming with or constituting a norm or standard or level or type or social norm; not abnormal intersecting at or forming right angles
in accordance with scientific laws at right angles to the plane of the horizon or a base line
being approximately average or within certain limits in e.g. intelligence and development so steep as to be nearly vertical
forming a right angle