10-year-old VS 10 years old

[Polyester]

10-year-old VS 10 years old

What's the difference between two words?

 

[emsr2d2]

It depends on context, as always.

In the following sentences, the first is a noun. The second is a combination of words making up an adjective.

My son is a 10-year-old.
My son is 10 years old.

Here, the first is an adjective.

I have a bottle of 10-year-old whisky at home

 

[kompstar]

And are "My son is 10 year old" or "I have a bottle of 10-year​s-old whisky at home" correct?

 

[Matthew Wai]

"My son is 10 year old"

'S' should be added after 'year' because it is a noun.

10-year​s-old whisky

'S' should be removed because it is an adjective.

Not a teacher.

 

[emsr2d2]

And are "My son is 10 year old" or "I have a bottle of 10-year​s-old whisky at home" correct?

Neither is correct. My examples showed you the correct way of using it.

My son is ten years old.
My son is a ten-year-old.
I have a ten-year-old son.

 

[Polyester]

It depends on context, as always.

In the following sentences, the first is a noun. The second is a combination of words making up an adjective.

My son is a 10-year-old.
My son is 10 years old.

Here, the first is an adjective.

I have a bottle of 10-year-old whisky at home

Is he older than 10 years or equal to 10 years old?

( I wrote down in red.)

 

[Matthew Wai]

Is he older than 10 years or equal to 10 years old?

If he is older than 10 years old, he is over 10 years old.

Not a teacher.

 

[emsr2d2]

"My son is a ten-year-old" means "My son is ten years old". He has had his tenth birthday. He has not yet reached his eleventh birthday.