noun
odor
OH-dur/ˈoʊdər/
A smell, especially an unpleasant one.
The odor from the open bin makes him pinch his nose.

Etymology
Latin odor covered pleasant and disagreeable smells alike. English initially used the word for sweet fragrance before broadening it to smell generally, including the unpleasant smells emphasized in this sense.
In context
Death has a a certain odor and and and it's a specific smell.