gizmo vs convenience

gizmo and convenience both are nouns.

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

As nouns, gizmo and convenience are synonyms defined as:

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

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

gizmo (noun)	convenience (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	a toilet that is available to the public
	the quality of being useful and convenient
	the state of being suitable or opportune