headset vs receiver

headset and receiver both are nouns.

Word	Noun	Adjective	Verb	Adverb
headset	Yes	No	No	No
receiver	Yes	No	No	No

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

Other hypernyms of headset include telephone receiver.

headset (noun)	receiver (noun)
receiver consisting of a pair of headphones	set that receives radio or tv signals
	earphone that converts electrical signals into sounds
	a person who receives something
	(law) a person (usually appointed by a court of law) who liquidates assets or preserves them for the benefit of affected parties
	a football player who catches (or is supposed to catch) a forward pass
	the tennis player who receives the serve