wake-up call vs phone call

wake-up call and phone call both are nouns.

Word	Noun	Adjective	Verb	Adverb
wake-up call	Yes	No	No	No
phone call	Yes	No	No	No

As nouns, phone call is a hypernym of wake-up call; that is, phone call is a word with a broader meaning than wake-up call:

wake-up call: a telephone call that you request be made at a specific time in order to wake you up
phone call: a method of contacting a person by phone

Other hypernyms of wake-up call include call, telephone call.

wake-up call (noun)	phone call (noun)
a telephone call that you request be made at a specific time in order to wake you up	a method of contacting a person by phone
a warning to take action concerning something that was overlooked or neglected