Roget's Thesaurus

#426. Opacity

Nouns

opacity; opaqueness etc. adj.. film; cloud etc. 353.

Verbs

be opaque etc. adj.; obstruct the passage of light; obfuscate, offuscate.

Adjectives

opaque, impervious to light; adiaphanous; dim etc. 422; turbid, thick, muddy, opacous, obfuscated, fuliginous, cloud, hazy, misty, foggy, vaporous, nubiferous, muggy etc. (turbidity) 426a. smoky, fumid, murky, dirty.

#426a. Turbidity

Nouns

turbidity, cloudiness, fog, haze, muddiness, haziness, obscurity. nephelometer [instrument to measure turbidity].

Adjectives

turbid, thick, muddy, obfuscated, fuliginous, hazy, misty, foggy, vaporous, nubiferous; cloudy (cloud) 353. smoky, fumid, murky, dirty.