1.  house of cards(n = noun.cognition) bubble - a speculative scheme that depends on unstable factors that the planner cannot control; "his proposal was nothing but a house of cards"; "a real estate bubble"
is a kind of scheme, strategy

2.  house of cards(n = noun.artifact) card-house, cardcastle, cardhouse - an unstable construction with playing cards; "he built three levels of his cardcastle before it collapsed"
is a kind of construction, structure

N  weakness, debility, atony, relaxation, languor, enervation, impotence, infirmity, effeminacy, feminality, fragility, flaccidity, inactivity, anaemia, bloodlessness, deficiency of blood, poverty of blood, declension of strength, loss of strength, failure of strength, delicacy, invalidation, decrepitude, asthenia, adynamy, cachexy, cachexia, sprain, strain, reed, thread, rope of sand, house of cards, softling, weakling, infant, youth, weak, feeble, debile, impotent, relaxed, unnerved sapless, strengthless, powerless, weakly, unstrung, flaccid, adynamic, asthenic, nervous, soft, effeminate, feminate, womanly, frail, fragile, shattery, flimsy, unsubstantial, insubstantial, gimcrack, gingerbread, rickety, creaky, creaking, cranky, craichy, drooping, tottering, broken, lame, withered, shattered, shaken, crazy, shaky, palsied, decrepit, languid, poor, infirm, faint, faintish, sickly, dull, slack, evanid, spent, short-winded, effete, weather-beaten, decayed, rotten, worn, seedy, languishing, wasted, washy, laid low, pulled down, the worse for wear, unstrengthened, unsupported, unaided, unassisted, aidless, defenseless, cantilevered (support), on its last legs, weak as a child, weak as a baby, weak as a chicken, weak as a cat, weak as a rat, weak as water, weak as water gruel, weak as gingerbread, weak as milk and water, colorless, non sum qualis eram.

N  brittleness, fragility, friability, frangibility, fissibility, house of cards, house of glass, brittle, brash, breakable, weak, frangible, fragile, frail, gimcrack, shivery, fissile, splitting, lacerable, splintery, crisp, crimp, short, brittle as glass.

adobe house, apartment house, auction house, battle of monmouth court house, beach house, bee house, boarding house, british house of commons, british house of lords, brokerage house, building supply house, cards, carriage house, charnel house, church house, clean house, clearing house, coach house, coal house, conference house, country house, crazy house, death house, deck of cards, detached house, detention house, discount house, dog house, doll's house, duplex house, dwelling house, eating house, european house cricket, field house, fish house punch, frat house, fraternity house, free house, full house, funny house, gambling house, gaming house, glebe house, guest house, halfway house, hash house, house, house agent, house arrest, house cat, house centipede, house decorator, house detective, house dick, house finch, house fly, house guest, house husband, house martin, house mouse, house of burgesses, house of commons, house of correction, house of detention, house of god, house of hanover, house of ill repute, house of islam, house of lancaster, house of lords, house of prayer, house of prostitution, house of representatives, house of tudor, house of war, house of windsor, house of worship, house of york, house organ, house paint, house painter, house painting, house party, house physician, house servant, house sitter, house snake, house sparrow, house trailer, house wren, in the adjacent house, in the cards, jook house, joss house, juke house, keep house, lady of the house, lamp house, lazar house, lodging house, lower house, mail order house, manor house, mansion house, meat house, meeting house, monmouth court house, movie house, nut house, oast house, on the house, open house, opera house, pack of cards, packing house, parker house roll, planetary house, playing cards, post house, prison house, public house, publishing house, pump house, ranch house, rest house, rooming house, row house, royal house, safe house, semi-detached house, semidetached house, settlement house, sod house, solar house, sporting house, stack the cards, stash house, station house, summer house, tap house, tenement house, terraced house, third house, toll house cookie, town house, tract house, treasure house, tree house, u.s. house, u.s. house of representatives, united states house of representatives, upper house, us house, us house of representatives, wendy house, white house, wholesale house, woman of the house