Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
card-house is a noun meaning "an unstable construction with playing cards". It carries one recorded sense.
an unstable construction with playing cards
“he built three levels of his cardcastle before it collapsed”
Definitions, synonyms and semantic relations for card-house come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.