Centra and Omphalos

Omphalos and centra are semantically related. in center topic. In some cases you can use "Omphalos" instead a noun "Centra", when it comes to topics like middle point.

Omphalos noun - A thing or place that is of greatest importance to an activity or interest.

Centra and omphalos are semantically related. Sometimes you can replace term "Centra" with "Omphalos", this nouns are similar.