cell phone vs telephone

cell phone is not a noun while telephone is a noun.

Word	Noun	Adjective	Verb	Adverb
cell phone	No	No	Yes	No
telephone	Yes	No	Yes	No

As verbs, telephone is a hypernym of cell phone; that is, telephone is a word with a broader meaning than cell phone:

Other hypernyms of cell phone include call, call up, phone, ring.

cell phone (noun)	telephone (noun)
	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

cell phone (verb)	telephone (verb)
call up by using a cellular phone	get or try to get into communication (with someone) by telephone