| smoke(noun, exhaust, air, obscurity, gas) |
| steam(air, obscurity, mist, fogginess, gas) |
| cloud(obscurity, mist, fogginess, mistiness) |
| haze(noun, air, obscurity, mist, fogginess) |
| mist(air, obscurity, fogginess, gas) |
| smog(noun, air, obscurity, contamination, mist) |
| brume(obscurity, mist, fogginess, mistiness) |
| cloudy air(expression, obscurity, mist, fogginess) |
| dimness(obscurity, mist, fogginess, mistiness) |
| film(obscurity, mist, fogginess, mistiness) |
| ground clouds(expression, obscurity, mist, fogginess) |
| haziness(obscurity, mist, fogginess, mistiness) |
| indistinctness(obscurity, mist, fogginess, mistiness) |
| murk(obscurity, mist, fogginess, mistiness) |
| obscurity(mist, fogginess, mistiness, haziness) |
| smokiness(obscurity, mist, fogginess, mistiness) |
| smother(obscurity, mist, fogginess, mistiness) |
| soup(obscurity, mist, fogginess, mistiness) |