scholium vs scholia

scholium and scholia both are nouns.

Word	Noun	Adjective	Verb	Adverb
scholium	Yes	No	No	No
scholia	Yes	No	No	No

As nouns, scholium and scholia are synonyms defined as:

scholium and scholia: a marginal note written by a scholiast (a commentator on ancient or classical literature)

scholium (noun)	scholia (noun)
a marginal note written by a scholiast (a commentator on ancient or classical literature)	a marginal note written by a scholiast (a commentator on ancient or classical literature)