bullarium/bʊˈlɛəɹi.əm/EtymologyBorrowed from Medieval Latin bullarium, from bulla (“seal; papal bull”) + -arium.bullarium means Synonym of bullary (“A collection of papal bulls”). Lexicurio rates it Sui generis — a strength score of 88 out of 100.nounSynonym of bullary (“A collection of papal bulls”).