The construction of a sewer or sewers. [1913 Webster]
The system of sewers in a city, town, etc.; the general drainage of a city or town by means of sewers. [1913 Webster]
The material collected in, and discharged by, sewers. [1913 Webster]

top

OXFORD DICTIONARY

sewerage, n. a system of or drainage by sewers.

top

ROGET THESAURUS

sewerage

Cleanness

N cleanness, cleanliness, purity, cleaning, purification, defecation, purgation, lustration, detersion, abstersion, epuration, mundation, ablution, lavation, colature, disinfection, drainage, sewerage, lavatory, laundry, washhouse, washerwoman, laundress, dhobi, laundryman, washerman, scavenger, dustman, sweep, white wings brush, broom, besom, mop, rake, shovel, sieve, riddle, screen, filter, blotter, napkin, cloth, maukin, malkin, handkerchief, towel, sudary, doyley, doily, duster, sponge, mop, swab, cover, drugget, wash, lotion, detergent, cathartic, purgative, purifier, disinfectant, aperient, benzene, benzine benzol, benolin, bleaching powder, chloride of lime, dentifrice, deobstruent, laxative, clean, cleanly, pure, immaculate, spotless, stainless, taintless, trig, without a stain, unstained, unspotted, unsoiled, unsullied, untainted, uninfected, sweet, sweet as a nut, neat, spruce, tidy, trim, gimp, clean as a new penny, like a cat in pattens, cleaned, kempt, abstergent, cathartic, cleansing, purifying, neatly, clean as a whistle.

Uncleanness

N uncleanness, impurity, immundity, immundicity, impurity, defilement, contamination, defoedation, soilure, soiliness, abomination, leaven, taint, tainture, fetor, decay, putrescence, putrefaction, corruption, mold, must, mildew, dry rot, mucor, rubigo, slovenry, slovenliness, squalor, dowdy, drab, slut, malkin, slattern, sloven, slammerkin, slammock, slummock, scrub, draggle-tail, mudlark, dust-man, sweep, beast, dirt, filth, soil, slop, dust, cobweb, flue, smoke, soot, smudge, smut, grit, grime, raff, sossle, sozzle, sordes, dregs, grounds, lees, argol, sediment, settlement heeltap, dross, drossiness, mother, precipitate, scoriae, ashes, cinders, recrement, slag, scum, froth, hogwash, ditchwater, dishwater, bilgewater, rinsings, cheeseparings, sweepings, offscourings, outscourings, off scum, caput mortuum, residuum, sprue, fecula, clinker, draff, scurf, scurfiness, exuviae, morphea, fur, furfur, dandruff, tartar, riffraff, vermin, louse, flea, bug, chinch, mud, mire, quagmire, alluvium, silt, sludge, slime, slush, slosh, sposh, spawn, offal, gurry, lientery, garbage, carrion, excreta, slough, peccant humor, pus, matter, suppuration, lienteria, faeces, feces, excrement, ordure, dung, crap, shit, sewage, sewerage, muck, coprolite, guano, manure, compost, dunghill, colluvies, mixen, midden, bog, laystall, sink, privy, jakes, toilet, john, head, cess, cesspool, sump, sough, cloaca, latrines, drain, sewer, common sewer, Cloacina, dust hole, sty, pigsty, lair, den, Augean stable, sink of corruption, slum, rookery, dirty, filthy, grimy, unclean, impure, soiled, not to be handled with kid gloves, dusty, snuffy, smutty, sooty, smoky, thick, turbid, dreggy, slimy, mussy, slovenly, untidy, messy, uncleanly, unkempt, sluttish, dowdy, draggle-tailed, uncombed, unscoured, unswept, unwiped, unwashed, unstrained, unpurified, squalid, lutose, slammocky, slummocky, sozzly, nasty, coarse, foul, offensive, abominable, beastly, reeky, reechy, fetid, decayed, moldy, musty, mildewed, rusty, moth-eaten, mucid, rancid, weak, bad, gone bad, etercoral, lentiginous, touched, fusty, effete, reasty, rotten, corrupt, tainted, high, flyblown, maggoty, putrid, putrefactive, putrescent, putrefied, saprogenic, saprogenous, purulent, carious, peccant, fecal, feculent, stercoraceous, excrementitious, scurfy, scurvy, impetiginous, gory, bloody, rotting, rotten as a pear, rotten as cheese, crapulous, gross, fimetarious, fimicolous, they that touch pitch will be defiled.

For further exploring for "sewerage" in Webster Dictionary Online