contraption vs gismo

contraption and gismo both are nouns.

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

As nouns, contraption and gismo are synonyms defined as:

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

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

contraption (noun)	gismo (noun)
a device or control that is very useful for a particular job	a device or control that is very useful for a particular job
	something unspecified whose name is either forgotten or not known