Synonyms for parasite

Noun

1. parasite, organism, being

usage: an animal or plant that lives in or on a host (another animal or plant); the parasite obtains nourishment from the host without benefiting or killing the host

2. leech, parasite, sponge, sponger, follower

usage: a follower who hangs around a host (without benefit to the host) in hope of gain or advantage