child support and women's rights?

Edit: I misread your question.

The two noun phrases are:

Child support = what a parent pays to support a child's living and school expenses.
Women's rights = rights of women - rights that women should have.

austere125rivers......child support
women's rights

Why don't they say woman right or children's support? is there any rule to follow?

That is probably because a person or family may have only one child that they are obliged to support, but "women's rights" refers to all the women in the world.

austere125riversWhy they don't say woman right or children's support? Is there any rule to follow?

There is no rule. Many expressions like these are arbitrary and fixed by tradition.

Nevertheless, we might reasonably speculate that "women's rights" are rights that belong to all women, whereas "child support"

What about "human rights" ?

austere125riversWhat about "human rights" ?

What are you asking?
Humans have more than one right.

Where is the possessive S in "human rights" Why do we say women's rights and not women rights?

austere125riversWhere is the possessive S in "human rights" Why do we say women's rights and not women rights?

We just don't say 'human's rights'. "human" functions as an adjective there.

austere125riversWhy do we say women's rights and not women rights?

From above: There is no rule. Many expressions like these are arbitrary.

Maybe 'woman rights' just sounded strange to those who first came up with the expression.

CJ

CalifJimFrom above: There is no rule. Many expressions like these are arbitrary.

I agree.

And /tinymce347/%20http:/en.wikipedia.org/wiki/List_of_animal_rights_groups%20.has also made the news.