convenience vs gadgetry

convenience and gadgetry both are nouns.

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

As nouns, gadgetry is a hyponym of convenience; that is, gadgetry is a word with a more specific, narrower meaning than convenience:

Other hyponyms of convenience include gimbal, injector, mod con.

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