scholia vs scholium

scholia and scholium both are nouns.

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

As nouns, scholia and scholium are synonyms defined as:

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

scholia (noun)	scholium (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)