You searched for: “capnomaniacs
capnomaniac (s) (noun), capnomaniacs (pl)
A person, or people, who have an obsessive or uncontrollable desire or habit of smoking one or more tobacco products (cigarettes, cigars, pipes, etc.) which for many is an addiction.

These words were coined by John G. Robertson in his book, An Excess of Phobias and Manias which was published in 2003 because they were not known to exist in any lexicon or other published source.