What are some opposite words for laughing gas?

Antonyms for laughing gaslaugh·ing gas

This page is about all possible antonyms and opposite words for the term laughing gas.

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Princeton's WordNet

  1. nitrous oxide, laughing gasnoun

    inhalation anesthetic used as an anesthetic in dentistry and surgery

    Synonyms:
    nitrous oxide

Synonyms, Antonyms & Associated Words

  1. laughing gas

    Synonyms:
    protoxide of nitrogen, nitrous oxide, hyponitrous oxide

Concise Medical Dictionary, by Joseph C Segen, MD

  1. laughing gas

    Synonyms:
    Nitrous oxide-N2O, see there

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