Added 9 October 2026 sulphur noun Categories: NatureUncommon Words noun ! Definition from Wiktionary (CC BY-SA). More about sulphur at Wordnik → Where our words come from → Alternative spelling of sulfur. verb Alternative spelling of sulfur. ↑ “So long sulphur”, in Nature Chemistry, volume 1, number 5, August 2009, →DOI, →ISSN, page 333: “It is not a question of American or Oxford English spelling, it is a given name — and 'correcting' such a name to a different spelling is wholly inappropriate.” Related Words: sulfurssulphuroussulphuricsulphidesulphatesulfuricsulfidesulfatedioxidehepar Back to today's word