The Collaborative International Dictionary of English v.0.48:

Faeces \F[ae]"ces\, n. pl. [L. faex, pl. faeces, dregs.]
   Excrement; ordure; also, settlings; sediment after infusion
   or distillation. [Written also feces.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Feces \Fe"ces\, n. pl.
   Dregs; sediment; excrement. See faeces.
   [1913 Webster]

WordNet (r) 3.0 (2006):

feces
    n 1: solid excretory product evacuated from the bowels [syn:
         fecal matter, faecal matter, feces, faeces, BM,
         stool, ordure, dejection]

Moby Thesaurus II by Grady Ward, 1.0:

56 Moby Thesaurus words for "feces":
   BM, alluvion, alluvium, ash, bowel movement, buffalo chips, ca-ca,
   cinder, clinker, coprolite, coprolith, cow chips, cow flops,
   cow pats, crap, defecation, deposition, deposits, diluvium,
   dingleberry, draff, dregs, droppings, dross, dung, ember,
   feculence, froth, grounds, guano, jakes, lees, loess, manure,
   moraine, movement, night soil, offscum, ordure, precipitate,
   precipitation, scoria, scum, sediment, settlings, sewage, sewerage,
   shit, silt, sinter, slag, smut, soot, stool, sublimate, turd