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

• coffin nail
• coffin nails
• coffins
• coffin ship
• coffin ships
• coffle
• coffles
• coffret
• coffrets
• coffs
• C of I
• cofiring
• C of S
• coft
• cog
• cog.
• COGB
• cogence
• cogences
• cogencies
• cogency
• cogener
• cogeners
• cogent
• cogently