cardcastle vs card-house

cardcastle and card-house both are nouns.

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

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

Other synonyms of cardcastle include cardhouse, house of cards.

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