procedure vs mapping

procedure and mapping both are nouns.

Word	Noun	Adjective	Verb	Adverb
procedure	Yes	No	No	No
mapping	Yes	No	No	No

As nouns, mapping is a hyponym of procedure; that is, mapping is a word with a more specific, narrower meaning than procedure:

procedure (noun)	mapping (noun)
a particular course of action intended to achieve a result	(genetics) the process of locating genes on a chromosome
a mode of conducting legal and parliamentary proceedings	the process of making maps
a process or series of acts especially of a practical or mechanical nature involved in a particular form of work	(mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
a set sequence of steps, part of larger computer program