WordNet (r) 3.0 (2006):

lay over
    v 1: interrupt a journey temporarily, e.g., overnight; "We had
         to stop over in Venezuela on our flight back from Brazil"
         [syn: lay over, stop over]
    2: place on top of; "can you superimpose the two images?" [syn:
       superimpose, superpose, lay over]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "lay over":
   adjourn, apply to, blanket, block, canopy, cloak, clothe, cloud,
   continue, cope, cover, cover up, cowl, curtain, defer, delay,
   drag out, eclipse, extend, film, hang fire, hang up, hold off,
   hold over, hold up, hood, lay aside, lay by, lay on, mantle, mask,
   muffle, obduce, obscure, occult, overlay, overspread, pigeonhole,
   postpone, prolong, prorogate, prorogue, protract, push aside,
   put aside, put off, put on, put on ice, recess, reserve, screen,
   scum, set aside, set by, shelve, shield, shift off, sleep on,
   sojourn, spread over, stand over, stave off, stay, stay over, stop,
   stop over, stretch out, superimpose, superpose, suspend, table,
   take a recess, veil, waive