contrivance vs contraption

contrivance and contraption both are nouns.

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

As nouns, contrivance and contraption are synonyms defined as:

contrivance and contraption: a device or control that is very useful for a particular job

Other synonyms of contrivance include appliance, convenience, gadget, gismo, gizmo, widget.

contrivance (noun)	contraption (noun)
the act of devising something	a device or control that is very useful for a particular job
a device or control that is very useful for a particular job
any improvised arrangement for temporary use
an elaborate or deceitful scheme contrived to deceive or evade
the faculty of contriving; inventive skill
an artificial or unnatural or obviously contrived arrangement of details or parts etc.