The early texts describe four stages, each cutting certain fetters. The stream-enterer has destroyed self-view, doubt and attachment to rites, and will reach liberation within seven lives. The once-returner has weakened desire and ill will; the non-returner has destroyed them; the arahant has destroyed all the fetters.
Four stages of awakening
Stream-entry, once-return, non-return and arahantship: the four noble paths of early Buddhism.
Also: four noble persons