Related by context. Frequent words. (Click for all words.) 49 coughing wheezing 47 wheezing coughing 46 Traffic snarls 45 Congested 45 clogged highways 45 traffic jams 45 stuffy noses 45 Clogged 45 hay fever sufferers 44 traffic congestions 44 Heavy snows 44 Rapid urbanization 44 Dust mites 44 post nasal drip 43 congested 43 Bitter cold 43 Sandstorms 43 Jet lag 43 congested roadways 43 congested freeways 43 Alleviating 42 Iceland volcanic ash 42 smoggiest 42 Thick fog 42 allergy sufferers 42 chronic sinus 42 asthma bronchitis 41 Overcapacity 41 congestion 41 Frigid weather 41 Traffic jams 41 Heavy fog 41 smog choked 41 runny nose sore throat 41 heavily polluted 41 Urban sprawl 41 Allergy sufferers 41 Sleepless nights 41 ash spewed 41 traffic snarls 41 smog 40 Dense fog 40 Loud noises 40 traffic congestion 40 peat bog fires 40 airways 40 stuffy nose 40 asthma sufferers 40 stomach cramping 40 Algae blooms 40 Heavy downpours 40 nausea dizziness 40 smoggy 39 itchy eyes 39 Infestations 39 nausea headaches 39 air pollution 39 megalopolis 39 scratchy throat 39 Heavy rains lashed 39 Sticker shock 39 eye irritations 39 swelters 39 Overcrowded 39 Whiteout conditions 39 Overheated 39 muscle ache 39 Icelandic volcanic ash cloud 39 rhinitis 39 asthmatics 39 airports 39 Northerly winds 39 snarled traffic 39 Indonesian volcano erupts 39 Freezing temperatures 39 nausea headache 39 headaches 38 nausea diarrhea 38 potholed roads 38 sinus congestion 38 notoriously polluted 38 itchy watery eyes 38 headache 38 eye irritation 38 Obstructive sleep apnea 38 Volcanic ash 38 fever muscle aches 38 Unseasonably warm weather 38 Iceland Eyjafjallajokull volcano 38 stranding motorists 38 congestions 38 Allergic reactions 38 Train derailment 38 Cabin fever 38 headache sufferers 38 Ear infections 38 Wintry weather 38 Passive smoking 38 Blowing snow 37 malaria cholera 37 throat irritation