[1] : WordNet (r) 2.0

soak up
     v 1: take in, also metaphorically; "the sponge absorbs water
          well"; "she drew strength from the minister's words"
          syn: absorb, suck, imbibe, sop up, suck up, draw,
           take in, take up
     2: engross oneself fully; "he immersed himself into his
        studies" syn: steep, immerse, engulf, plunge, engross,
         absorb
see also:
absorb suck imbibe sop up suck up draw 
take in take up steep immerse engulf 
plunge engross 

[2] : Moby Thesaurus II by Grady Ward, 1.0

64 moby thesaurus words for "soak up":
   absorb, adsorb, air-dry, anhydrate, assimilate, bake, blot,
   blot up, brush, burn, chemisorb, chemosorb, cure, dehumidify,
   dehydrate, desiccate, digest, drain, drink, drink in, drink up,
   dry, engross, evaporate, exsiccate, filter in, fire, imbibe,
   infiltrate, ingest, insolate, kiln, lap, lap up, lick, mummify,
   osmose, parch, percolate in, rub, scorch, sear, seep in, shrivel,
   slurp, slurp up, smoke, soak in, sorb, sponge, sponge up, sun,
   sun-dry, swab, swill up, take in, take up, thirst, torrefy, towel,
   weazen, wipe, wither, wizen

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