card-house vs cardhouse

card-house and cardhouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
card-house	Yes	No	No	No
cardhouse	Yes	No	No	No

As nouns, card-house and cardhouse are synonyms defined as:

Other synonyms of card-house include cardcastle, house of cards.

card-house (noun)	cardhouse (noun)
an unstable construction with playing cards	an unstable construction with playing cards