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20-year-old vs 20 year old

Both "20-year-old" and "20 year old" are correct, but they are used in different contexts. "20-year-old" is used as an adjective before a noun to describe the age of a person or thing, while "20 year old" is used as a noun phrase to refer to a person who is 20 years old.

Last updated: March 21, 2024 • 817 views

20-year-old

This phrase is correct and commonly used in English as an adjective to describe the age of a person or thing.

Use "20-year-old" when you want to describe the age of a person or thing before a noun. It should be hyphenated to show that it is a single adjective.

Examples:

She is a 20-year-old student.
The 20-year-old car needs repairs.
He is a 20-year-old man.

Show examples from the web [+]

7 Financial Skills Every 20-Year-Old Needs To Know. Develop serious money skills to get you past the financial stumbling blocks along the way. By Nancy ...
... 20-Year-Old Cyst Finally Gets Popped. Warning: Graphic! Watch as dermatologist Dr. Sandra Lee removes a large, 20-year-old cyst from one woman's scalp.
What are some major pieces of advice that you would give to a 20-year-old? What life lessons would you pass on? What books would you tell them to read?
Sep 17, 2015 ... Follow The Doctors on PINTEREST: https://pinterest.com/thedoctors/ Watch as dermatologist Dr. Sandra Lee removes a large, 20-year-old cyst ...

Alternatives:

a 20-year-old
a twenty-year-old
a person who is 20 years old
a 20-year-old person
a 20-year-old individual

20 year old

This phrase is correct and commonly used in English as a noun phrase to refer to a person who is 20 years old.

Use "20 year old" when referring to a person who is 20 years old. It is used as a noun phrase and does not require hyphens.

Examples:

She is a 20 year old.
He is a 20 year old.
They are both 20 year olds.

Show examples from the web [+]

7 Financial Skills Every 20-Year-Old Needs To Know. Develop serious money skills to get you past the financial stumbling blocks along the way. By Nancy ...
... 20-Year-Old Cyst Finally Gets Popped. Warning: Graphic! Watch as dermatologist Dr. Sandra Lee removes a large, 20-year-old cyst from one woman's scalp.
What are some major pieces of advice that you would give to a 20-year-old? What life lessons would you pass on? What books would you tell them to read?
Sep 17, 2015 ... Follow The Doctors on PINTEREST: https://pinterest.com/thedoctors/ Watch as dermatologist Dr. Sandra Lee removes a large, 20-year-old cyst ...

Alternatives:

a 20-year-old person
a person who is 20 years old
a 20-year-old individual
a twenty-year-old
a twenty-year-old person

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