One-time and Primaeval

One-time adjective - Belonging to some prior time.

Primaeval and one-time are semantically related. In some cases you can use "Primaeval" instead an adjective phrase "One-time".

Primaeval adjective - Having existed from the beginning; in an earliest or original stage or state.

One-time and primaeval are semantically related. Sometimes you can use "One-time" instead an adjective "Primaeval".