Related by context. Frequent words. (Click for all words.) 48 smoke 47 Cigarette smoke 45 aggravate asthma 45 inhale 44 Nitrogen oxides 43 menthols 43 secondhand tobacco 42 respiratory irritant 42 Diesel exhaust 41 rotten egg odor 41 puff 41 Passive smoking 41 Quit smoking 41 inhaling smoke 40 inhaling 40 cigarette smokers 40 inhaled 40 combustion gases 40 cigarette smoke 39 inhalations 39 unpleasant smell 39 smokers 39 secondhand smoke 39 nicotine 39 smoky 39 asthma bronchitis 39 menthol cigarette 39 soot particles 39 nonsmokers 38 Asthmatics 38 Inhaling 38 nonelderly 38 fumes 38 Secondhand smoke 38 respiratory tracts 38 Calcium supplements 38 thick plume 38 Huffing 38 nitrous oxides 38 Cigarette smoking 38 estrogen pills 37 Chewing tobacco 37 colorless liquid 37 www.lungusa.org 37 gases emitted 37 coughing wheezing 37 aerosol spray 37 inhaling toxic 37 Hydrogen sulfide 37 menthol cigarettes 37 diesel fumes 37 nonsmoking 37 Vitamin D supplements 37 diesel exhaust 37 COPD 37 People 37 snort 37 carbon monoxide CO 37 particulates 37 poisonous fumes 37 tobacco specific nitrosamines 37 Prolonged exposure 37 atomizer 37 exhaled breath 36 harmful pollutants 36 Tanning beds 36 Cigarette smokers 36 toxic gases 36 Nonsmokers Rights Foundation 36 vaporizer 36 methylene chloride 36 CDC Morbidity 36 hookah pipe 36 caramelize 36 vapors 36 smokes 36 Indians Alaska Natives 36 asthma emphysema 36 carbon monoxide 36 vapor 35 cigarettes 35 Thick clouds 35 consume 35 acrid 35 aromas 35 menthol 35 Oral contraceptives 35 asthmatics 35 cough sneeze 35 Americans 35 poisonous carbon monoxide 35 toxic fumes 35 William V. Corr 35 particulate matter emissions 35 cigarillo 35 Ultraviolet light 35 poisonous gases 35 butter flavored 35 fine particle pollution 35 CANCER peer reviewed 35 minty