Related by context. Frequent words. (Click for all words.) 61 inhaling 61 Ingesting 61 inhale 60 Prolonged exposure 60 Inhalation 59 inhaled 57 Cigarette smoke 56 Ingestion 55 Inhaled 54 Breathing 54 inhalation 52 oxidizes 52 Huffing 51 Hydrochloric acid 50 Acidic 50 inhales 50 colorless odorless 50 Swallowing 50 dehydrates 49 Baking soda 49 Sneezing 49 aggravate asthma 49 Nicotine 48 Sulfur dioxide 48 respiratory tract 48 Secondhand smoke 48 Particulate matter 47 Exposure 47 coughing wheezing 47 odorless 47 pet dander 47 odorless colorless 47 Capsaicin 47 Poisonous 47 Hydrogen peroxide 46 Allergens 46 incomplete combustion 46 exhales 46 seizures coma 46 Shortness 46 liquefies 46 Sniffing 46 Overdoses 46 ingests 46 Sucking 46 Inhaler 46 acidic foods 46 aerosol spray 45 Allergic reactions 45 formic acid 45 clog arteries 45 Odors 45 Digestion 45 metabolizes 45 Asthmatics 45 vaporizes 45 Spilled 45 cigarette smoke 45 fumes 45 Emphysema 45 Dehydration 44 Rubbing 44 Ammonia 44 Carbon Monoxide 44 Quitting smoking 44 ingesting 44 Extinguish 44 Traces 44 Acetone 44 urushiol 44 Carbon monoxide 44 Soot 44 Coughing 44 pungent smell 44 hydrogen chloride 44 naturally occurring substance 44 lungs 44 exhalation 44 exhalations 44 exhale 43 excreting 43 Nitrous oxide 43 Overexposure 43 aldehydes 43 polycyclic aromatic hydrocarbons PAHs 43 Acrylamide 43 oxalic acid 43 inactivates 43 Cigarette smoking 43 Anhydrous ammonia 43 exhaling 43 mucous membranes 43 nostrils 43 Consuming 43 Passive smoking 43 metabolizing 43 B Vitamins 43 Essential oils 43 Chlorine 43 exhaled 43 Injected