WordNet (r) 3.0 (2006):

drink in
    v 1: be fascinated or spell-bound by; pay close attention to;
         "The mother drinks in every word of her son on the stage"
         [syn: drink in, drink]

Moby Thesaurus II by Grady Ward, 1.0:

60 Moby Thesaurus words for "drink in":
   absorb, adsorb, advert to, assimilate, attend to, be aware of,
   be engrossed in, bib, blot, blot up, booze, chemisorb, chemosorb,
   digest, drain the cup, drink, drink off, drink to, drink up,
   engross, filter in, give heed to, give mind to, give thought to,
   guzzle, imbibe, infiltrate, ingest, look to, not forget, osmose,
   pay attention to, pay regard to, percolate in, pledge, pull, quaff,
   see to, seep in, sip, slurp up, soak in, soak up, sorb, sponge,
   suck, suck in, suckle, sup, swig, swill, swill up, take in,
   take up, tipple, toast, toss down, toss off, turn to, wash down