hernia vs herniation

hernia and herniation both are nouns.

Word	Noun	Adjective	Verb	Adverb
hernia	Yes	No	No	No
herniation	Yes	No	No	No

As nouns, hernia and herniation are synonyms defined as:

hernia and herniation: rupture in smooth muscle tissue through which a bodily structure protrudes

hernia (noun)	herniation (noun)
rupture in smooth muscle tissue through which a bodily structure protrudes	rupture in smooth muscle tissue through which a bodily structure protrudes