ostiarius vs ostiary

ostiarius and ostiary both are nouns.

Word	Noun	Adjective	Verb	Adverb
ostiarius	Yes	No	No	No
ostiary	Yes	No	No	No

As nouns, ostiarius and ostiary are synonyms defined as:

ostiarius and ostiary: the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church

Other synonyms of ostiarius include doorkeeper.

ostiarius (noun)	ostiary (noun)
the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church	someone who guards an entrance
	the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church