contrivance vs gadgetry

contrivance and gadgetry both are nouns.

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

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

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

contrivance (noun)	gadgetry (noun)
the act of devising something	appliances collectively
a device or control that is very useful for a particular job
any improvised arrangement for temporary use
an elaborate or deceitful scheme contrived to deceive or evade
the faculty of contriving; inventive skill
an artificial or unnatural or obviously contrived arrangement of details or parts etc.