Princeton's WordNet
causal(adj)
involving or constituting a cause; causing
Antonyms:
noncausal, noncausative
Dictionary of English Synonymes
causal(a.)
Synonyms:
causative
PPDB, the paraphrase database
List of paraphrases:
causality, cause-effect, causative, causation, cause-and-effect, etiologic, etiological, casual, determinants
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