Archibald /ärˈchi-bəld or -böld/ or in short form Archie /ärˈchi/ (milit sl, esp from World War I and II)

An anti-aircraft gun

• operculate
• operculated
• operculum
• opere citato
• operetta
• operettas
• operettist
• operettists
• operon
• operons
• operose
• operosely
• operoseness
• operosenesses
• operosities
• operosity
• ophi-
• ophicalcite
• ophicalcites
• ophicleide
• ophicleides
• Ophidia
• ophidian
• ophidians
• ophidiaria