| obscuration(covering, fold, coat, obscurity, layer) |
| obscurity(noun, shade, mass, gloom, darkness) |
| overlay(verb, cover, obscure, encase) |
| overspread(verb, cover, obscure, steamed, mantling) |
| pale(verb, dull, reduce, lower, fade) |
| perplexity(mist, smog, vapor) |
| perturb(upset, trouble, obscure, confuse, baffle) |
| quantity(noun, multitude) |
| rattle(upset, trouble, obscure, confuse, baffle) |
| scum(covering, fold, coat, obscurity, layer) |
| smirch |
| smother(noun, mass, gloom, obscurity, puff) |
| stifle |
| tar(hurt, dirty, corrupt, stain, muddy) |
| tone down(verb, expression, phrasal verb, cover, moderate) |
| upset(verb, trouble, dull, obscure, confuse) |
| water vapour |
| weaken(moderate, soften, dilute) |
| fizz(noun, verb, bubble) |
| foam(noun, verb, bubble) |