Sulfur
Part of speech: noun
Definition: A chemical element (symbol S) with an atomic number of 16. A yellowish green colour, like that of sulfur.
Part of speech: adjective
Definition: A yellowish green colour, like that of sulfur.
Part of speech: verb
Definition: to treat with sulfur, or a sulfur compound, either to preserve or to counter agricultural pests
Sulphur
Part of speech: noun
Definition: An alternative spelling of sulfur (see "Alternative spellings" on that page)