Start with a Quiz on Hyphen Use Can you tell which of these sentences correctly employ the hyphen? Hyphens are widely misused by writers, but this discussion covers only one kind of hyphen-related usage problem.
Here are some further examples: Her dress is light green. They are our second-biggest client. Should you write land owners, land-owners or landowners? This client is our second biggest.
The same rules apply when numbers are part of the description, and whether the numbers are cardinal one, two, three … or ordinal first, second, third …. He is 26 years old.
In this example, year-olds is acting as a substitute for a noun, so we hyphenate it.