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What is another word for antediluvian?

Need synonyms for antediluvian? Here's a list of similar words from our thesaurus that you can use instead.

Ridiculously old-fashioned
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“Officials at headquarters either forgot about it, or could not store the information in a useful place because of an antediluvian computer system.”
Of or belonging to the time before the biblical Flood
“The antediluvian myth is one where it is suggested that the ancients lived exceptionally long lives.”
Before a flood
Someone with old-fashioned or out-of-date ideas or conceptions
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