telephone vs cell phone

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

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

As verbs, cell phone is a hyponym of telephone; that is, cell phone is a word with a more specific, narrower meaning than telephone:

Other hyponyms of telephone include call in.

telephone (noun)	cell phone (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

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