Related by context. Frequent words. (Click for all words.) 68 emphysema 64 lung cancer 62 lung 61 asthma 60 pneumonia 60 kidney disease 59 respiratory illness 59 liver disease 58 COPD 58 heart disease 56 disease 56 chronic obstructive pulmonary 55 respiratory 55 respiratory diseases 55 cancer 54 cystic fibrosis 54 kidney failure 54 colon cancer 53 leukemia 53 mesothelioma 53 pancreatic cancer 53 illnesses 51 Lou Gehrig disease 51 congestive heart failure 51 tuberculosis 51 lupus 51 liver cancer 50 cardiovascular disease 50 chronic illnesses 50 bronchitis 49 lymphoma 49 illness 49 Alzheimer disease 49 Parkinson disease 48 cancers 48 diseases 48 bacterial infection 48 chronic illness 47 bladder cancer 47 chronic diseases 47 lungs 47 dementia 47 breathing difficulties 47 sleep apnea 47 blood clots 47 multiple myeloma 47 coronary artery disease 47 thyroid cancer 47 hypertension 47 lung function 47 bowel cancer 47 asthmatic 47 multiple sclerosis 46 rheumatoid arthritis 46 colorectal cancer 46 breast cancer 46 meningitis 46 ovarian cancer 46 brain tumors 46 prostate cancer 45 muscular dystrophy 45 congenital heart 45 arthritis 45 angina 45 diabetes 45 cardiovascular diseases 45 secondhand smoke 44 lung transplant 44 DVT 44 epilepsy 44 allergies 44 brain tumor 44 Alzheimer 44 melanoma 44 cervical cancer 44 cirrhosis 43 ALS 43 Tuberculosis 43 Asthma 43 birth defects 43 degenerative 43 air pollution 43 sepsis 43 premature birth 42 Parkinson Disease 42 ailments 42 atherosclerosis 42 macular degeneration 42 cataracts 42 organ failure 42 ailment 42 coronary heart 42 chronic kidney 42 Alzheimer Disease 42 asbestos 42 Breast cancer 42 Crohn disease 42 glaucoma 42 genetic disorder 42 eczema 41 viral infection