The Collaborative International Dictionary of English v.0.48:

Molder \Mold"er\, Moulder \Mould"er\, n.
   One who, or that which, molds or forms into shape;
   specifically (Founding), one skilled in the art of making
   molds for castings.
   [1913 Webster] Molder

The Collaborative International Dictionary of English v.0.48:

Molder \Mold"er\, Moulder \Mould"er\, v. i. [imp. & p. p.
   Molderedor Mouldered; p. pr. & vb. n. Moldering or
   Mouldering.] [From Mold fine soft earth: cf. Prov. G.
   multern.]
   To crumble into small particles; to turn to dust by natural
   decay; to lose form, or waste away, by a gradual separation
   of the component particles, without the presence of water; to
   crumble away.
   [1913 Webster]

         The moldering of earth in frosts and sun. --Bacon.
   [1913 Webster]

         When statues molder, and when arches fall. --Prior.
   [1913 Webster]

         If he had sat still, the enemy's army would have
         moldered to nothing.                     --Clarendon.
   [1913 Webster] Molder

The Collaborative International Dictionary of English v.0.48:

Molder \Mold"er\, Moulder \Mould"er\, v. t.
   To turn to dust; to cause to crumble; to cause to waste away.
   [1913 Webster]

         [Time's] gradual touch
         Has moldered into beauty many a tower.   --Mason.
   [1913 Webster] Moldery

The Collaborative International Dictionary of English v.0.48:

Mould \Mould\ (m[=o]lt), Moulder \Mould"er\ (m[=o]ld"[~e]r),
Mouldy \Mould"y\ (m[=o]ld"[y^]), etc.
   See Mold, Molder, Moldy, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

moulder
    v 1: break down; "The bodies decomposed in the heat" [syn:
         decompose, rot, molder, moulder]

Moby Thesaurus II by Grady Ward, 1.0:

467 Moby Thesaurus words for "moulder":
   Ectocarpales, Phaeophyceae, Platonic form, Platonic idea,
   accommodate, accommodate with, accord, acres, adapt, adapt to,
   adenovirus, adjust, adjust to, aerobe, aerobic bacteria,
   aesthetic form, agree with, algae, alluvion, alluvium, amoeba,
   anaerobe, anaerobic bacteria, anatomy, animus, aptitude,
   arable land, archetype, architectonics, architecture, aroma,
   arrangement, art form, assemble, assimilate to, attribute,
   autophyte, bacillus, bacteria, bacterium, badge, be guided by,
   bean, bend, bent, bias, biodegradability, biodegradation, blast,
   blight, block out, blood, body-build, bracken, brand, break up,
   breakup, breed, brown algae, bug, build, building, cachet, cancer,
   canker, carve, cast, casting, character, characteristic,
   characteristics, chime in with, chisel, clan, clay, climber, clod,
   coccus, color, complexion, comply, comply with, compose,
   composition, compound, concoct, conferva, confervoid,
   configuration, conform, conformation, constituents, constitution,
   construct, construction, correct, correspond, corrosion, corrupt,
   corruption, crasis, create, creation, creeper, crumble,
   crumble into dust, crust, cut, decay, decompose, decomposition,
   degradability, degradation, denomination, description, designation,
   devise, dharma, diathesis, diatom, die, differentia, differential,
   dilapidation, dirt, discipline, disease-producing microorganism,
   disintegrate, disintegration, disorganization, disposition,
   dissolution, distinctive feature, dry land, dry rot, dust, earmark,
   earth, eccentricity, echovirus, efform, elaborate, enterovirus,
   erect, ethos, evolve, extrude, fabric, fabricate, fabrication,
   fall in with, fall into decay, fall to pieces, fashion, fashioning,
   feather, feature, fern, fester, fiber, figuration, figure,
   filterable virus, fit, fix, flavor, follow, forge, forging, form,
   formalize, format, formation, formulate, found, frame, freehold,
   fruits and vegetables, fucus, fudge together, fungi, fungus,
   gangrene, gear to, genius, genre, genus, germ, get up, getup,
   glebe, go bad, go by, go to pieces, grain, gram-negative bacteria,
   gram-positive bacteria, grapevine, grassland, green algae, ground,
   gulfweed, gust, habit, hallmark, harmonize, herb, heterophyte, hew,
   hue, humor, humors, idiocrasy, idiosyncrasy, ilk, impress,
   impression, inclination, index, indite, individualism, inner form,
   intaglio, ivy, kelp, keynote, kidney, kin, kind, knead, knock out,
   label, land, landholdings, last, lay out, layout, leaning, legume,
   lentil, liana, lichen, lick into shape, line, lineaments,
   lithosphere, liverwort, lot, make, make conform, make up, makeup,
   making, manner, mannerism, manufacture, marginal land, mark,
   marking, marl, matrix, mature, meet, mental set, mettle, microbe,
   microorganism, mildew, mind, mind-set, mint, modality, mode, model,
   mold, molder, molding, molds, mortify, moss, moth, moth and rust,
   mushroom, must, nature, necrose, negative, nonfilterable virus,
   number, observe, odor, organic structure, organism, organization,
   oxidation, oxidization, parasite, parasitic plant, particularity,
   patch together, pathogen, pattern, patterning, pea, peculiarity,
   persuasion, perthophyte, pest, phylum, physique, phytoplankton,
   picornavirus, piece together, plan, planktonic algae,
   plant families, predilection, predisposition, prefabricate,
   preference, prepare, proclivity, produce, production, propensity,
   property, prototype, protozoa, protozoon, puffball, pulse, punch,
   put together, put up, putrefy, putresce, quality, quirk, race,
   raise, rankle, real estate, real property, rear, reconcile,
   rectify, red algae, region, regolith, reovirus, resolution,
   rhinovirus, rickettsia, rockweed, rot, rough out, roughcast,
   roughhew, rub off corners, run up, rust, saprophyte, sargasso,
   sargassum, savor, sculpt, sculpture, sea lentil, sea moss,
   sea wrack, seal, seaweed, set, set up, settle, setup, shape,
   shaping, shoe last, significant form, singularity, slant, smack,
   smut, sod, soil, somatotype, sort, specialty, species, sphacelate,
   spirillum, spirit, spirochete, spoil, spoilage, spore, stamp,
   staphylococcus, straighten, strain, streak, streptococcus, stripe,
   structure, structuring, style, subaerial deposit, subsoil,
   succulent, suchness, suit, suppurate, system, tailor, taint,
   tally with, tang, taste, tectonics, temper, temperament, template,
   tendency, tenor, terra, terra firma, terrain, territory, texture,
   thallogens, the country, the like of, the likes of, thermoform,
   tissue, toadstool, token, tone, topsoil, trait, tribe, trick,
   trypanosome, turn, turn of mind, twist, type, variety, vein, vetch,
   vibrio, vine, virus, warp, warp and woof, way, weave, web,
   whomp up, woodland, work, worm, wort, wrack, write, yield