The Collaborative International Dictionary of English v.0.48:

Seethe \Seethe\, v. t. [imp. Seethed(Sod, obs.); p. p.
   Seethed, Sodden; p. pr. & vb. n. Seething.] [OE.
   sethen, AS. se['o]?an; akin to D. sieden, OHG. siodan, G.
   sieden, Icel. sj??a, Sw. sjuda, Dan. syde, Goth. saubs a
   burnt offering. Cf. Sod, n., Sodden, Suds.]
   To decoct or prepare for food in hot liquid; to boil; as, to
   seethe flesh. [Written also seeth.]
   [1913 Webster]

         Set on the great pot, and seethe pottage for the sons
         of the prophets.                         --2 Kings iv.
                                                  38.
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The Collaborative International Dictionary of English v.0.48:

Sod \Sod\, v. t. [imp. & p. p. Sodden; p. pr. & vb. n.
   Sodding.]
   To cover with sod; to turf.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sod \Sod\, n. (Zool.)
   The rock dove. [Prov. Eng.]
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The Collaborative International Dictionary of English v.0.48:

Sod \Sod\, n. [Akin to LG. sode, D. zode, OD. sode, soode,
   OFries. satha, and E. seethe. So named from its sodden state
   in wet weather. See Seethe.]
   That stratum of the surface of the soil which is filled with
   the roots of grass, or any portion of that surface; turf;
   sward.
   [1913 Webster]

         She there shall dress a sweeter sod
         Than Fancy's feet have ever trod.        --Collins.
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The Collaborative International Dictionary of English v.0.48:

Sod \Sod\, obs.
   imp. of Seethe.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sod
    n 1: surface layer of ground containing a mat of grass and grass
         roots [syn: turf, sod, sward, greensward]
    2: an enzyme that catalyzes the conversion of superoxide into
       hydrogen peroxide and oxygen; "oxygen free radicals are
       normally removed in our bodies by the superoxide dismutase
       enzymes" [syn: superoxide dismutase, SOD]
    3: someone who engages in anal copulation (especially a male who
       engages in anal copulation with another male) [syn:
       sodomite, sodomist, sod, bugger]
    4: an informal British term for a youth or man; "the poor sod
       couldn't even buy a drink"
    v 1: cover with sod

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "sod":
   acres, alluvion, alluvium, arable land, bugger, clay, clod, crust,
   cur, dirt, divot, dog, dry land, dust, earth, freehold, glebe,
   grassland, greensward, ground, land, landholdings, lithosphere,
   louse, marginal land, marl, mold, puke, real estate, real property,
   region, regolith, scum, skunk, snake, soil, subaerial deposit,
   subsoil, sward, terra, terra firma, terrain, territory,
   the country, topsoil, turf, woodland, wretch