Years-Old-Year-Old | Commonly Confused Words

Year old

/jɪr oʊld /

Used to indicate the number of years someone or something has lived or existed

This word has no antonyms

/jɪrz oʊld/

Used to indicate the age of someone or something, showing the number of years they have existed.

She will turn eighteen years old next month.Puppies typically reach maturity at one year old.The ancient tree in the park is over 200 years old.

Years old is used when referring to age in plural form, such as when a person has lived for more than one year.
Year old is used as a compound adjective describing something that has been around for exactly one year.
When using year-old, it often modifies a noun, like a year-old child.
Years old is a stand-alone term usually preceded by how many years, for example, She is five years old.
Year old can also appear as a one-year-old plant focusing on the age of the item as an adjective.