'twas /twoz, twəz/ (archaic or dialect) a contraction of it was

• corbies
• corbie-steps
• cor blimey
• corcass
• corcasses
• Corchorus
• cord
• cordage
• cordages
• Cordaitaceae
• Cordaites
• cordate
• cordectomies
• cordectomy
• corded
• Cordelier
• cord grass
• cord grasses
• cordial
• cordialise
• cordialised
• cordialises
• cordialising
• cordialities
• cordiality