WordNet (r) 3.0 (2006):

lie in
    v 1: originate (in); "The problems dwell in the social
         injustices in this country" [syn: dwell, consist,
         lie, lie in]
    2: be in confinement for childbirth

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "lie in":
   abide in, approach anchorage, be coextensive with, be comprised in,
   be confined, be constituted by, be contained in, be found,
   be located, be present in, be situated, bear, bear a child,
   bear down on, bear down upon, bear up for, bear up to, bear young,
   calve, cast, close with, consist in, drop, dwell in, exist in,
   farrow, fawn, fetch, foal, give birth, go aboard, go alongside,
   have, have a baby, have young, inhabit, inhere in, kitten, labor,
   lamb, lay aboard, lay for, lay in, lie, litter, make, make at,
   make for, pup, put away for, put in, put into port, reach, repose,
   repose in, reside in, rest, rest in, run for, sail for, stand,
   stand for, steer toward, subsist in, throw, travail, whelp, yean