Is there a word (adjective or noun) for people who has no children, just like single for people who is not married?
I looked on the internet and found the word childfree, but it seems to describe a lifestyle preference instead of being a simple statement of fact.
The word is childless.
This is neither positive nor negative in tone, and does not imply whether the couple remains without children by choice or by some other circumstance (e.g. one partner might be sterile.)
You can say "childless". There are probably other alternatives.
Barren • archaic (of a woman) infertile. synonyms: infertile, sterile, childless; technicalinfecund "a barren woman" antonyms: fertile
• (of a female animal) not pregnant or unable to become so.
There is the word nulliparous, which is a medical term for not having children (whether by choice or by infertility).
Wordnik defines the adjective as:
nulliparous (adj.) Of the condition of a nullipara.
while nullipara is defined as:
nullipara (noun)
obstetricsA woman who has never given birth.
This is not a word you would encounter very often, and other options (like childless) would usually be more appropriate for everyday conversation.
