The Collaborative International Dictionary of English v.0.48:

Together \To*geth"er\, adv. [OE. togedere, togidere, AS.
   t[=o]g[ae]dere, t[=o]g[ae]dre, t[=o]gadere; t[=o] to + gador
   together. [root]29. See To, prep., and Gather.]
   1. In company or association with respect to place or time;
      as, to live together in one house; to live together in the
      same age; they walked together to the town.
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            Soldiers can never stand idle long together.
                                                  --Landor.
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   2. In or into union; into junction; as, to sew, knit, or
      fasten two things together; to mix things together.
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            The king joined humanity and policy together.
                                                  --Bacon.
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   3. In concert; with mutual cooperation; as, the allies made
      war upon France together.
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   Together with, in union with; in company or mixture with;
      along with.
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            Take the bad together with the good.  --Dryden.
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WordNet (r) 3.0 (2006):

together with
    adv 1: in conjunction with; combined; "our salaries put together
           couldn't pay for the damage"; "we couldn't pay for the
           damages with all our salaries put together" [syn:
           jointly, collectively, conjointly, together with]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "together with":
   added to, along with, amid, amidst, among, amongst, as well as,
   attended by, coupled with, in addition to, in agreement with,
   in association with, in company with, in conjunction with,
   in keeping with, in line with, in there with, including,
   inclusive of, let alone, linked to, mid, midst, not to mention,
   over and above, partnered with, plus, right with, together on,
   with