FFXVI and XIV connection theory

[SilverArrow20XX]

The void and rift not interchangable in FFXIV.

The void is the Thirteenth shard. The rift is the nowhere-space between shards.

I was referring to general FF lore terminology as it relates to the multiverse. Not XIV specifically.
Though I will be surprised if the concept of the primordial energy often called the Void isn't introduced eventually.