strategy vs contrivance

strategy and contrivance both are nouns.

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

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

strategy (noun)	contrivance (noun)
an elaborate and systematic plan of action	the act of devising something
the branch of military science dealing with military command and the planning and conduct of a war	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.