Having no end is a state of something that seems to be endless, never-ending or perpetual. Some synonyms for this state include infinite, eternal, limitless, boundless, interminable, permanent, incessant, continual, and unending. These similar words convey the idea of something that has no conclusion, no termination, and no boundary. When we say that something is endless, we mean it has no limits. Similarly, when we say that something is eternal, we imply it lasts forever. Words like infinite and boundless mean that something is immeasurable, immense, or vast. Overall, there are several suitable synonyms to describe the state of having no end.