telephone call vs telephone

telephone call and telephone both are nouns.

Word	Noun	Adjective	Verb	Adverb
telephone call	Yes	No	No	No
telephone	Yes	No	Yes	No

As nouns, telephone is a hypernym of telephone call; that is, telephone is a word with a broader meaning than telephone call:

Other hypernyms of telephone call include telephony.

telephone call (noun)	telephone (noun)
a method of contacting a person by phone	electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds
	transmitting speech at a distance

telephone call (verb)	telephone (verb)
	get or try to get into communication (with someone) by telephone