Question

noun1 an organism which lives in or on another organism (its host) and benefits by deriving nutrients at the other's expense.2 a person who habitually relies on or exploits others and gives nothing in return.

Accepted Answer

parasite

Front	noun 1 an organism which lives in or on another organism (its host) and benefits by deriving nutrients at the other's expense. 2 a person who habitually relies on or exploits others and gives nothing in return.
Back	parasite

Organism Noun Lives Host Benefits Deriving Nutrients Other's