1) Able or tending to absorb 2) Absorbefacient 3) Absorbent 4) Assimilating 5) Assimilative 6) Assimilatory 7) Hygroscopic 8) Sorbefacient 9) Spongelike 10) Spongy 11) Thirsty 
• (a.) Having power, capacity, or tendency to absorb or imbibe.
Synonym for absorbent ... 1. Anything which absorbs. 'The ocean, itself a bad absorbent of heat.' (Darwin) ... 2. <medicine> Any substance which absorbs and neutralizes acid fluid in the stomach and bowels, as magnesia, chalk, etc.; also a substance e. G, iodine) which acts on the absorbent vessels so as to reduce enlarged and indurated parts...
(ab-sorp´tiv) having the power of absorption; involving absorption.
Ab·sorp'tive adjective Having power, capacity, or tendency to absorb or imbibe. E. Darwin. 
Type: Term Pronunciation: ab-sōrp′tiv Synonyms: absorbent1
able or tending to absorb; absorbent.