telephone vs telephoner

telephone and telephoner both are nouns.

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

telephone (noun)	telephoner (noun)
electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds	the person initiating a telephone call
transmitting speech at a distance

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