The Collaborative International Dictionary of English v.0.48:

Loading \Load"ing\, n.
   1. The act of putting a load on or into.
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   2. A load; cargo; burden. --Shak.
      [1913 Webster] Loadmanage

The Collaborative International Dictionary of English v.0.48:

Load \Load\, v. t. [imp. & p. p. Loaded; p. pr. & vb. n.
   Loading. Loaden is obsolete, and laden belongs to lade.]
   1. To lay a load or burden on or in, as on a horse or in a
      cart; to charge with a load, as a gun; to furnish with a
      lading or cargo, as a ship; hence, to add weight to, so as
      to oppress or embarrass; to heap upon.
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            I strive all in vain to load the cart. --Gascoigne.
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            I have loaden me with many spoils.    --Shak.
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            Those honors deep and broad, wherewith
            Your majesty loads our house.         --Shak.
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   2. To adulterate or drug; as, to load wine. [Cant]
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   3. To magnetize. [Obs.] --Prior.
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   Loaded dice, dice with one side made heavier than the
      others, so that the number on the opposite side will come
      up oftenest.
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WordNet (r) 3.0 (2006):

loading
    n 1: weight to be borne or conveyed [syn: load, loading,
         burden]
    2: a quantity that can be processed or transported at one time;
       "the system broke down under excessive loads" [syn: load,
       loading]
    3: the ratio of the gross weight of an airplane to some factor
       determining its lift
    4: goods carried by a large vehicle [syn: cargo, lading,
       freight, load, loading, payload, shipment,
       consignment]
    5: the labor of putting a load of something on or in a vehicle
       or ship or container etc.; "the loading took 2 hours" [ant:
       unloading]

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "loading":
   allocation, assignment, bale, bother, burden, burdening, burthen,
   cargo, charge, charging, collocation, cumber, cumbrance,
   deadweight, demand, deployment, deposit, deposition, disposition,
   drag, emplacement, encumbrance, exaction, freight, freighting,
   handicap, imposing an onus, imposition, inconsiderateness,
   inconvenience, incubus, incumbency, infliction, lading, laying on,
   load, loading down, localization, locating, location, millstone,
   obtrusiveness, oppression, overload, overtaxing, overweighting,
   packing, pinpointing, placement, placing, positioning, posting,
   pressure, presumptuousness, putting, reposition, saddling,
   situation, spotting, stationing, storage, stowage, superincumbency,
   surcharge, tasking, taxing, trouble, unwarranted demand,
   weighting