intercom vs interphone

intercom and interphone both are nouns.

Word	Noun	Adjective	Verb	Adverb
intercom	Yes	No	No	No
interphone	Yes	No	No	No

As nouns, interphone is a hyponym of intercom; that is, interphone is a word with a more specific, narrower meaning than intercom:

intercom: a communication system linking different rooms within a building or ship etc
interphone: a telephonic intercommunication system linking different rooms in a building or ship etc

Other hyponyms of intercom include door bell phone, door phone.

intercom (noun)	interphone (noun)
a communication system linking different rooms within a building or ship etc	a telephonic intercommunication system linking different rooms in a building or ship etc