Able to be done without; able to be expended; easily replaced.
Subject to dispensation; possible to relax, exempt from, or annul.
Capable of being dispensed; distributable.
Not essential to be taken in as part of an organism's diet, as it can be synthesized de novo.
Sustainable; able to be regrown or renewed; having an ongoing or continuous source of supply; not finite.
Able to be renewed; capable of renewal.
A renewable resource.
A thing that is renewable; especially, a renewable source of energy.