Endless
Part of speech: adjective
Definition: having no end extending indefinitely
Example sentence: The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary.
Eternal
Part of speech: adjective
Definition: Lasting forever; unending.existing outside time; as opposed to sempiternal, existing within time but everlastingly
Example sentence: We are not victims of aging, sickness and death. These are part of scenery, not the seer, who is immune to any form of change. This seer is the spirit, the expression of eternal being.