The Oxford Thesaurus An A-Z Dictionary of Synonyms INTRO ...

pellicle: There is a film of grease over everything. 2 motion
picture, movie, picture; videotape; Colloq flick, pic; video:
Why do they show the same films every Christmas? 3 veil,
screen, murkiness, blur, smokescreen, haze, mist, haziness,
mistiness, cloud, vapour, fog, steam: I could barely make out
the road through the film on the windscreen.
--v. 4 film over, coat, cover, dim, obscure, fade (away), veil,
screen, blur, blear, mist, cloud, glaze,: The pond filmed over
with bacteria. Her eyes filmed with tears. 5 photograph, shoot,
take, (video)tape: If the director insists, then the scene must
be filmed again.
filmy adj. 1 gauzy, gossamer(-like), sheer, delicate, diaphanous,
transparent, translucent, flimsy, light, cobwebby,
insubstantial, see-through, peekaboo: Phoebe looked very
seductive in her filmy negligee. 2 murky, blurry, cloudy, hazy,
misty, bleary, blurred, dim, clouded, beclouded, milky, pearly,
opalescent: We inched down the cliff in the filmy light of the
moon.
filter n. 1 sieve, colander, riddle, screen, strainer, gauze, cloth,
cheesecloth, membrane: To allow the liquid to pass through, a
clean filter must be used.
--v. 2 Sometimes, filter out. strain, screen, sift, winnow,
clarify, refine, purify, clean; separate, weed out, exclude,
eliminate: Some people filter tap water to improve its taste.
This company would be improved if we could filter out the
undesirable elements. 3 leach, percolate, drip, seep, dribble,
trickle, drain, run or pass through, ooze: The rainwater is
filtered through fine sand to purify it.
filth n. 1 sewage or sewerage, dirt, slime, muck, sludge, sullage,
effluent, pollution, trash, rubbish, garbage, refuse, ordure,
(night-)soil, excrement, faeces, excreta, manure, droppings,
guano, dung, foul matter, filthiness, offal, leavings, carrion,
decay, putrescence, putrefaction, Slang crud, Brit gunge, US
grunge, Taboo slang shit: Cleaning the filth from the Augean
stables was the fifth labour of Hercules. 2 corruption,
vileness, baseness, foulness, rottenness, debasement,
defilement, taint, pollution, adulteration, perversion,
degradation, taint; sullying, besmirchment: Sodom and Gomorrah