perceiver vs observer

perceiver and observer both are nouns.

Word	Noun	Adjective	Verb	Adverb
perceiver	Yes	No	No	No
observer	Yes	No	No	No

As nouns, perceiver and observer are synonyms defined as:

perceiver and observer: a person who becomes aware (of things or events) through the senses

Other synonyms of perceiver include beholder, percipient.

perceiver (noun)	observer (noun)
a person who becomes aware (of things or events) through the senses	a person who becomes aware (of things or events) through the senses
	an expert who observes and comments on something