The Collaborative International Dictionary of English v.0.48:

Spiked \Spiked\, a.
   Furnished or set with spikes, as corn; fastened with spikes;
   stopped with spikes.
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         A youth, leaping over the spiked pales, . . . was
         caught by those spikes.                  --Wiseman.
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The Collaborative International Dictionary of English v.0.48:

Spike \Spike\, v. t. [imp. & p. p. Spiked; p. pr. & vb. n.
   Spiking.]
   1. To fasten with spikes, or long, large nails; as, to spike
      down planks.
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   2. To set or furnish with spikes.
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   3. To fix on a spike. [R.] --Young.
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   4. To stop the vent of (a gun or cannon) by driving a spike
      nail, or the like into it.
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WordNet (r) 3.0 (2006):

spiked
    adj 1: having a long sharp point

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "spiked":
   acanthoid, acanthous, acicular, acuate, aculeate, aculeiform,
   acuminate, acute, barbed, cornuted, cusped, cuspidate, hispid,
   horned, horny, mucronate, needle-pointed, needle-sharp, pointed,
   pronged, sharp-pointed, spiculate, spiky, spined, spinous, spiny,
   tapered, tapering, tined, toothed, unbated