symbiosis vs interdependency

symbiosis and interdependency both are nouns.

Word	Noun	Adjective	Verb	Adverb
symbiosis	Yes	No	No	No
interdependency	Yes	No	No	No

As nouns, interdependency is a hypernym of symbiosis; that is, interdependency is a word with a broader meaning than symbiosis:

symbiosis: the relation between two different species of organisms that are interdependent; each gains benefits from the other
interdependency: a reciprocal relation between interdependent entities (objects or individuals or groups)

Other hypernyms of symbiosis include interdependence, mutuality.

symbiosis (noun)	interdependency (noun)
the relation between two different species of organisms that are interdependent; each gains benefits from the other	a reciprocal relation between interdependent entities (objects or individuals or groups)