herniated disc vs slipped disc

herniated disc and slipped disc both are nouns.

Word	Noun	Adjective	Verb	Adverb
herniated disc	Yes	No	No	No
slipped disc	Yes	No	No	No

As nouns, herniated disc and slipped disc are synonyms defined as:

herniated disc and slipped disc: a painful rupture of the fibrocartilage of the disc between spinal vertebrae; occurs most often in the lumbar region

Other synonyms of herniated disc include ruptured intervertebral disc.

herniated disc (noun)	slipped disc (noun)
a painful rupture of the fibrocartilage of the disc between spinal vertebrae; occurs most often in the lumbar region	a painful rupture of the fibrocartilage of the disc between spinal vertebrae; occurs most often in the lumbar region