Ancient and Well-established

Ancient adjective - Dating or surviving from the distant past.

Well-established and ancient are semantically related in classic topic. In some cases you can use "Well-established" instead an adjective "Ancient", when it comes to topics like timeless.

Nearby Word: anciently

Ancient and well-established are semantically related in classic topic. You can use "Ancient" instead an adjective phrase "Well-established", if it concerns topics such as timeless, very old.