house of cards vs strategy

house of cards and strategy both are nouns.

Word	Noun	Adjective	Verb	Adverb
house of cards	Yes	No	No	No
strategy	Yes	No	No	No

As nouns, strategy is a hypernym of house of cards; that is, strategy is a word with a broader meaning than house of cards:

house of cards: a speculative scheme that depends on unstable factors that the planner cannot control
strategy: an elaborate and systematic plan of action

Other hypernyms of house of cards include scheme.

house of cards (noun)	strategy (noun)
an unstable construction with playing cards	an elaborate and systematic plan of action
a speculative scheme that depends on unstable factors that the planner cannot control	the branch of military science dealing with military command and the planning and conduct of a war