1. book shop / bookshop
2. book store / bookstore
Are both grammatical in each number?
I found that in the dictionary here, it is bookshop and bookstore.
bookshop and bookstore are both correct.
What about book shop or book store?Each is composed of two word.
Referring to a particular shop... the words are combined in normal usage. Joseph Beth is a bookstore or bookshop. I can't recall them being used separately.