normal vs perpendicular

normal and perpendicular both are nouns.

Word	Noun	Adjective	Verb	Adverb
normal	Yes	Yes	No	No
perpendicular	Yes	Yes	No	No

normal (noun)	perpendicular (noun)
something regarded as a normative example	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

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