listener vs beholder

listener and beholder both are nouns.

Word	Noun	Adjective	Verb	Adverb
listener	Yes	No	No	No
beholder	Yes	No	No	No

As nouns, beholder is a hypernym of listener; that is, beholder is a word with a broader meaning than listener:

listener: someone who listens attentively
beholder: a person who becomes aware (of things or events) through the senses

Other hypernyms of listener include observer, perceiver, percipient.

listener (noun)	beholder (noun)
someone who listens attentively	a person who becomes aware (of things or events) through the senses