contrivance vs device

contrivance and device both are nouns.

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

As nouns, device is a hypernym of contrivance; that is, device is a word with a broader meaning than contrivance:

contrivance (noun)	device (noun)
the act of devising something	any clever maneuver
a device or control that is very useful for a particular job	an instrumentality invented for a particular purpose
any improvised arrangement for temporary use	an emblematic design (especially in heraldry)
an elaborate or deceitful scheme contrived to deceive or evade	any ornamental pattern or design (as in embroidery)
the faculty of contriving; inventive skill	something in an artistic work designed to achieve a particular effect
an artificial or unnatural or obviously contrived arrangement of details or parts etc.