Interdependence is mutual dependence between things. ... Inter- means "between," so interdependence is dependence between things. We often use interdependence to describe complex systems.

Is interdependent one word?

mutually dependent; depending on each other.

Is interdependence a verb or noun?

interdependence noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com.