card-house vs cardcastle

card-house and cardcastle both are nouns.

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

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

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

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