Email and Phone call

Email noun - (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in.

Phone call and email are semantically related. In some cases you can use "Phone call" instead a noun "Email".

Phone call noun - A telephone connection.

Email and phone call are semantically related. Sometimes you can use "Email" instead a noun phrase "Phone call".