And then there’s PTO, which is sometimes “paid time off,” and sometimes “personal time off,” which is also paid:

https://en.wikipedia.org/wiki/Paid_time_off

Perhaps it’s best, as another comment suggests, to always include the adjectives “paid” or “unpaid.”

The modifier matters

Paid time off

Unpaid time off

Leave of absence

Quit and reapply when you get back.