[{"word":"saltpeter","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"Potassium nitrate.","synonyms":[],"antonyms":[]},{"definition":"Sodium nitrate.","synonyms":[],"antonyms":[]}],"synonyms":["Chile saltpeter","Chile saltpetre","caliche","soda niter","soda nitre","sodium nitrate","Chilean saltpeter","Chilean saltpetre","niter","nitrate of potash","nitre","potassium nitrate"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/saltpeter","https://en.wiktionary.org/wiki/saltpetre"]}]