1) Aroma emitter 2) Aromatic substance 3) Sachet 4) Scent carrier 5) Scent-providing stuff 6) Smelly substance 
• (a.) Yielding odors; fragrant.
A substance that gives off a smell.
(o´dәr-әnt) any substance capable of stimulating the sense of smell.
O'dor·ant adjective [ Latin odorans , -antis , present participle] Yielding odors; fragrant. Holland. 
Type: Term Pronunciation: ō′dŏr-ănt Definitions: 1. A substance with an odor.
odorant 1. That which emits a scent. 2. Something that gives a characteristic smell to a product.