widget vs gadgetry

widget and gadgetry both are nouns.

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

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

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

widget (noun)	gadgetry (noun)
a device or control that is very useful for a particular job	appliances collectively
something unspecified whose name is either forgotten or not known