Different RS485 Full-Duplex with RS422
RS-422 and RS-485 use the same electrical interface specification.

If you use that interface to build a bidirectional link on a single pair of wires, it's called RS-485, and it supports half-duplex operation.

If you use that interface to build two unidirectional links on two pairs of wires, it's called RS-422, and it supports full-duplex operation. This is sometimes mistakenly referred to as "full-duplex RS-485", but that's really a nonsense phrase.