gadget vs gismo

gadget and gismo both are nouns.

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

As nouns, gadget and gismo are synonyms defined as:

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

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

gadget (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