witness vs beholder

witness and beholder both are nouns.

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

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

witness: someone who sees an event and reports what happened
beholder: a person who becomes aware (of things or events) through the senses

Other hypernyms of witness include observer, perceiver, percipient, speaker, talker, utterer, verbaliser, verbalizer.

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

witness: a close observer; someone who looks at something (such as an exhibition of some kind)
beholder: a person who becomes aware (of things or events) through the senses

Other hypernyms of witness include observer, perceiver, percipient.

witness (noun)	beholder (noun)
testimony by word or deed to your religious faith	a person who becomes aware (of things or events) through the senses
someone who sees an event and reports what happened
a close observer; someone who looks at something (such as an exhibition of some kind)
(law) a person who attests to the genuineness of a document or signature by adding their own signature
(law) a person who testifies under oath in a court of law

witness (verb)	beholder (verb)
be a witness to
perceive or be contemporaneous with