cards — any game or games played with cards, esp playing cards
guards — to keep safe from harm or danger; protect; watch over: to guard the ruler.
hards — not soft; solid and firm to the touch; unyielding to pressure and impenetrable or almost impenetrable.
yards — the ground that immediately adjoins or surrounds a house, public building, or other structure.
Two-syllable rhymes
regards — to look upon or think of with a particular feeling: to regard a person with favor.
Three-syllable rhymes
house of cards — a structure or plan that is insubstantial and subject to imminent collapse, as a structure made by balancing playing cards against each other: The scheme is so overly complicated that it's likely to prove to be just another house of cards.