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

• herb Robert
• herbs
• herb tea
• herb teas
• herb-trinity
• herby
• Herceptin
• hercogamies
• hercogamous
• hercogamy
• Herculean
• Hercules beetle
• Hercules' choice
• Hercules' club
• Hercynian
• hercynite
• hercynites
• herd
• herd-book
• herd-books
• herdboy
• herdboys
• herded
• herden
• herdens