Suppose there is a web application with several webpages, amongst them one with the title "Receipts". In the user's manual of this web application or a similar place, are both "the Receipts page" and ...
Why is it Englishman, Frenchman, etc. (one word) but British man (two words)?
Nouns can modify nouns: cat food, coffee cup, gold ring, laser surgery, flood insurance. It seems to me there are even cases where a noun sounds better than the corresponding adjective: sociology ...