contrivance vs arrangement

contrivance and arrangement both are nouns.

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

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

contrivance: any improvised arrangement for temporary use
arrangement: an orderly grouping (of things or persons) considered as a unit; the result of arranging

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

contrivance: an artificial or unnatural or obviously contrived arrangement of details or parts etc.
arrangement: an organized structure for arranging or classifying

Other hypernyms of contrivance include organisation, organization, system.

contrivance (noun)	arrangement (noun)
the act of devising something	the act of arranging and adapting a piece of music
a device or control that is very useful for a particular job	the spatial property of the way in which something is placed
any improvised arrangement for temporary use	an organized structure for arranging or classifying
an elaborate or deceitful scheme contrived to deceive or evade	the thing arranged or agreed to
the faculty of contriving; inventive skill	a piece of music that has been adapted for performance by a particular set of voices or instruments
an artificial or unnatural or obviously contrived arrangement of details or parts etc.	an orderly grouping (of things or persons) considered as a unit; the result of arranging