Example of hyphenated-compound nouns

Examples of traditionally hyphenated compound nouns are:

• blue-green
• five-year-old
• jack-in-the-box
• jack-in-the-pulpit
• mother-in-law, father-in-law, sister-in-law, brother-in-law
• six-pack
• T-shirt (or tee-shirt)
• x-ray