Any substance that has a distinctive smell, especially one added to something (such as household gas) for safety purposes(noun)
Having an odour / odour(adjective)
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Use "odorant" in a sentence
"And the odor which the natural wood tree emits - why we can even replace it with a squirt or two of odorant from a plastic bottle."
"Aux Sable Liquid Products said in a letter to public safety officials dated Sept. 8 and obtained by the Associated Press that the odorant is typically added at its Morris, Ill., plant."
""The lack of odorant is not itself dangerous," Aux Sable Vice President Katherine Dodds wrote in the letter."