1. At a previous time
   - once, at one time, erstwhile [archaic], erst [archaic], sometime [archaic]

Sounds like: formally

• moulder
• mouldiness
• moulding
• mouldy
• moulin
• Moulmein
• moult
• moulter
• moulting
• mound
• mound builder
• mound over
• mound-bird
• mounded over
• mount
• Mount Adams
• Mount Ararat
• Mount Asama
• Mount Athos
• Mount Bartle Frere
• Mount Carmel
• Mount Communism
• Mount Cook lily
• Mount Elbert
• Mount Etna