formation vs arrangement

formation and arrangement both are nouns.

Word	Noun	Adjective	Verb	Adverb
formation	Yes	No	No	No
arrangement	Yes	No	No	No

As nouns, arrangement is a hypernym of formation; that is, arrangement is a word with a broader meaning than formation:

Other hypernyms of formation include placement.

As nouns, arrangement is a hypernym of formation; that is, arrangement is a word with a broader meaning than formation:

formation: an arrangement of people or things acting as a unit
arrangement: an orderly grouping (of things or persons) considered as a unit; the result of arranging

formation (noun)	arrangement (noun)
the act of fabricating something in a particular shape	the act of arranging and adapting a piece of music
the act of forming or establishing something	the spatial property of the way in which something is placed
creation by mental activity	an organized structure for arranging or classifying
a particular spatial arrangement	the thing arranged or agreed to
an arrangement of people or things acting as a unit	a piece of music that has been adapted for performance by a particular set of voices or instruments
(geology) the geological features of the earth	an orderly grouping (of things or persons) considered as a unit; the result of arranging
natural process that causes something to form