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Wordage.info / sponge

Exact Match:

primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies
a porous mass of interlacing fibers the forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used
gather sponges, in the ocean
wipe with a sponge, so as to clean or moisten
soak up with a sponge
erase with a sponge; as of words on a blackboard