The Collaborative International Dictionary of English v.0.48:

Seem \Seem\ (s[=e]m), v. i. [imp. & p. p. Seemed (s[=e]md); p.
   pr. & vb. n. Seeming.] [OE. semen to seem, to become,
   befit, AS. s[=e]man to satisfy, pacify; akin to Icel. saema
   to honor, to bear with, conform to, saemr becoming, fit,
   s[=o]ma to beseem, to befit, sama to beseem, semja to
   arrange, settle, put right, Goth. samjan to please, and to E.
   same. The sense is probably due to the adj. seemly.
   [root]191. See Same, a., and cf. Seemly.]
   To appear, or to appear to be; to have a show or semblance;
   to present an appearance; to look; to strike one's
   apprehension or fancy as being; to be taken as. "It now
   seemed probable." --Macaulay.
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         Thou picture of what thou seem'st.       --Shak.
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         All seemed well pleased; all seemed, but were not all.
                                                  --Milton.
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         There is a way which seemeth right unto a man; but the
         end thereof are the ways of death.       --Prov. xiv.
                                                  12.
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   It seems, it appears; it is understood as true; it is said.
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            A prince of Italy, it seems, entertained his
            mistress on a great lake.             --Addison.
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   Syn: To appear; look.

   Usage: Seem, Appear. To appear has reference to a thing's
          being presented to our view; as, the sun appears; to
          seem is connected with the idea of semblance, and
          usually implies an inference of our mind as to the
          probability of a thing's being so; as, a storm seems
          to be coming. "The story appears to be true," means
          that the facts, as presented, go to show its truth;
          "the story seems to be true," means that it has the
          semblance of being so, and we infer that it is true.
          "His first and principal care being to appear unto his
          people such as he would have them be, and to be such
          as he appeared." --Sir P. Sidney.
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                Ham. Ay, madam, it is common.
                Queen. If it be,
                Why seems it so particular with thee?
                Ham. Seems, madam! Nay, it is; I know not
                "seems."                          --Shak.
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The Collaborative International Dictionary of English v.0.48:

Seem \Seem\, v. t.
   To befit; to beseem. [Obs.] --Spenser.
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WordNet (r) 3.0 (2006):

seem
    v 1: give a certain impression or have a certain outward aspect;
         "She seems to be sleeping"; "This appears to be a very
         difficult problem"; "This project looks fishy"; "They
         appeared like people who had not eaten or slept for a long
         time" [syn: look, appear, seem]
    2: seem to be true, probable, or apparent; "It seems that he is
       very gifted"; "It appears that the weather in California is
       very bad" [syn: appear, seem]
    3: appear to exist; "There seems no reason to go ahead with the
       project now"
    4: appear to one's own mind or opinion; "I seem to be
       misunderstood by everyone"; "I can't seem to learn these
       Chinese characters"

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "seem":
   ape, appear, appear like, approach, approximate, be like,
   be redolent of, bear resemblance, bring to mind, call to mind,
   call up, come close, come near, compare with, copy, correspond,
   counterfeit, evoke, favor, feel, follow, hint, imitate, imply,
   insinuate, intimate, look, look like, match, mimic, mirror, near,
   nearly reproduce, not tell apart, parallel, partake of,
   remind one of, resemble, savor of, seem like, seem to be, simulate,
   smack of, sound, sound like, stack up with, suggest, take after