The Collaborative International Dictionary of English v.0.48:

Pock \Pock\, n. [OE. pokke, AS. pocc, poc; akin to D. pok, G.
   pocke, and perh. to E. poke a pocket. Cf. Pox.] (Med.)
   A pustule raised on the surface of the body in variolous and
   vaccine diseases.
   [1913 Webster]

         Of pokkes and of scab every sore.        --Chaucer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pock
    n 1: a pustule in an eruptive disease
    v 1: mark with a scar; "The skin disease scarred his face
         permanently" [syn: scar, mark, pock, pit]

Moby Thesaurus II by Grady Ward, 1.0:

165 Moby Thesaurus words for "pock":
   abscess, alveolation, alveolus, aposteme, bed sore, birthmark,
   blackhead, blain, bleb, blemish, blister, boil, bubo, bulla, bump,
   bunion, canker, canker sore, carbuncle, chancre, chancroid, check,
   chilblain, cicatrix, cold sore, comedo, corn, crack, crater, craze,
   cyst, defacement, defect, deformation, deformity, dent, depress,
   dilatation, dilation, dimple, dint, disfiguration, disfigurement,
   distension, distortion, edema, engrave, eschar, fault, feel, felon,
   fester, festering, fever blister, finish, fistula, flaw, freckle,
   furrow, furuncle, furunculus, gathering, gouge, grain,
   granular texture, gumboil, hemangioma, hemorrhoids, hickey,
   honeycomb, impress, impression, imprint, indent, indentation,
   indention, indenture, intumescence, keloid, kibe, kink, knub,
   lentigo, lesion, lump, milium, mole, nap, needle scar, nevus,
   notch, nub, papula, papule, paronychia, parulis, petechia, pile,
   piles, pimple, pit, pockmark, polyp, port-wine mark,
   port-wine stain, press in, print, protuberance, punch, punch in,
   pustule, recess, rift, rising, scab, scar, scratch, sebaceous cyst,
   set back, set in, shag, soft chancre, sore, split, stamp, stigma,
   strawberry mark, structure, sty, sunken part, suppuration, surface,
   surface texture, swell, swelling, swollenness, tamp, texture,
   track, tubercle, tumefaction, tumescence, tumidity, tumor,
   turgescence, turgescency, turgidity, twist, ulcer, ulceration,
   verruca, vesicle, wale, warp, wart, weal, weave, welt, wen, wheal,
   whelk, whitehead, whitlow, woof, wound