telephone receiver vs headphone

telephone receiver and headphone both are nouns.

Word	Noun	Adjective	Verb	Adverb
telephone receiver	Yes	No	No	No
headphone	Yes	No	No	No

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

telephone receiver: earphone that converts electrical signals into sounds
headphone: electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear

Other hypernyms of telephone receiver include earphone, earpiece, phone.

telephone receiver (noun)	headphone (noun)
earphone that converts electrical signals into sounds	electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear