The Collaborative International Dictionary of English v.0.48:

Nutriment \Nu"tri*ment\, n. [L. nutrimentum, fr. nutrire to
   nourish. See Nourish.]
   [1913 Webster]
   1. That which nourishes; a nutrient; anything which promotes
      growth and repairs the natural waste of animal or
      vegetable life; food; aliment.
      [1913 Webster]

            The stomach returns what it has received, in
            strength and nutriment diffused into all parts of
            the body.                             --South.
      [1913 Webster]

   2. That which promotes development or growth.
      [1913 Webster]

            Is not virtue in mankind
            The nutriment that feeds the mind?    --Swift.
      [1913 Webster]

WordNet (r) 3.0 (2006):

nutriment
    n 1: a source of materials to nourish the body [syn:
         nutriment, nourishment, nutrition, sustenance,
         aliment, alimentation, victuals]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "nutriment":
   aliment, alimentation, bread, bread and butter, growth regulator,
   keep, livelihood, living, maintenance, nourishment, nurture,
   nutrient, nutritive, pabulum, pap, refection, refreshment,
   subsistence, support, sustenance