sponge

Sponge has 1 syllable.

noun. Someone able to acquire new knowledge and skills rapidly and easily.

verb. Ask for and get free; be a parasite.

noun. A follower who hangs around a host (without benefit to the host) in hope of gain or advantage.

noun. Primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies.