Nouns

(n)spongea porous mass of interlacing fibers that forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used
(n)quick study, spongesomeone able to acquire new knowledge and skills rapidly and easily“she soaks up foreign languages like a sponge”
(n)leech, parasite, sponge, spongera follower who hangs around a host (without benefit to the host) in hope of gain or advantage
(n)sponge, poriferan, parazoanprimitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies

Verbs

(v)spongewipe with a sponge, so as to clean or moisten
(v)mooch, bum, cadge, grub, spongeask for and get free; be a parasite
(v)spongeerase with a sponge; as of words on a blackboard
(v)spongesoak up with a sponge
(v)spongegather sponges, in the ocean