gadgetry vs convenience

gadgetry and convenience both are nouns.

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

As nouns, convenience is a hypernym of gadgetry; that is, convenience is a word with a broader meaning than gadgetry:

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

gadgetry (noun)	convenience (noun)
appliances collectively	a device or control that is very useful for a particular job
	a toilet that is available to the public
	the quality of being useful and convenient
	the state of being suitable or opportune