gadget vs appliance

gadget and appliance both are nouns.

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

As nouns, gadget and appliance are synonyms defined as:

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

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

gadget (noun)	appliance (noun)
a device or control that is very useful for a particular job	durable goods for home or office use
	a device or control that is very useful for a particular job