absorbentEnglishOxford English Thesaurusabsorbent adjective a piece of absorbent cotton wool: porous, spongy, sponge-like, permeable, pervious, absorptive, penetrable, assimilative, receptive, soaking, blotting; technical spongiform; rare sorbefacient. ▷antonyms impermeable, waterproof.absorbent Oxford Dictionary of English