20
haze(noun, nature, gloom, air, pollution)
17
mist(noun, nature, gloom, film, air)
15
cloud(noun, nature, mass, obscurity, mist)
14
fog(noun, nature, gloom, pollution, darkness)
12
smoke(noun, nature, gloom, air, pollution)
9
effluvium(noun, nature, air, mist, gas)
8
gauze(obscurity, fogginess, mistiness)
8
miasma(noun, air, obscurity, smoke, mist)
8
pollution(noun, exhaust, contamination, gas, effluence)
8
vapor(noun, gloom, air, darkness, puff)
7
vapour
6
smogginess
6
air pollution(expression, idiom)
6
brume(gloom, obscurity, darkness, puff, mist)
6
film(noun, gloom, obscurity, darkness, puff)
6
fume(noun, smoke)
5
nebula(nature, gloom, obscurity, darkness, puff)
5
becloud
4
befog
4
darken
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APASmart Define. (2015). smog thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/smog/thesaurus/synonyms
ChicagoSmart Define. 2015. "smog thesaurus" https://smartdefine.org/smog/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, smog thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/smog/thesaurus/synonyms>.
MLASmart Define. "smog thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/smog/thesaurus/synonyms>