gizmo vs appliance

gizmo and appliance both are nouns.

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

As nouns, gizmo and appliance are synonyms defined as:

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

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

gizmo (noun)	appliance (noun)
a device or control that is very useful for a particular job	durable goods for home or office use
something unspecified whose name is either forgotten or not known	a device or control that is very useful for a particular job