WordNet (r) 3.0 (2006):

box in
    v 1: enclose or confine as if in a box [syn: box in, box up]

Moby Thesaurus II by Grady Ward, 1.0:

95 Moby Thesaurus words for "box in":
   abate, adjust to, alter, assuage, beleaguer, beset, besiege,
   blockade, bottle up, bound, box, box up, cabin, cage, casket,
   chamber, circumscribe, cloister, close in, closet, coffin, compass,
   condition, confine, contain, coop, coop in, coop up, cordon,
   cordon off, corral, cramp, crib, diminish, encase, encircle,
   enclose, encompass, enshrine, entomb, fence in, hedge, hedge about,
   hedge in, hem, hem in, house in, immure, impound, imprison,
   incarcerate, include, jail, keep from spreading,
   keep within bounds, kennel, leaguer, leaven, limit, localize, mew,
   mew up, mitigate, moderate, modify, modulate, narrow, palliate,
   pen, pen in, pocket, qualify, quarantine, rail in, reduce,
   regulate by, restrain, restrict, season, set conditions,
   set limits, shrine, shut in, shut up, soften, stable, stint,
   straiten, surround, temper, tighten, wall in, wrap, yard,
   yard up