Phonebook and Yellow pages

Phonebook noun - A directory containing an alphabetical list of telephone subscribers and their telephone numbers.

Yellow pages and phonebook are semantically related. In some cases you can replace phrase "Yellow pages" with "Phonebook", this terms are similar.

Yellow pages noun - A telephone directory or section of a directory (usually printed on yellow paper) where business products and services are listed alphabetically by field along with classified advertising.

Phonebook and yellow pages are semantically related. Sometimes you can use "Phonebook" instead a noun phrase "Yellow pages".