perceiver vs discoverer

perceiver and discoverer both are nouns.

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

As nouns, discoverer is a hyponym of perceiver; that is, discoverer is a word with a more specific, narrower meaning than perceiver:

perceiver: a person who becomes aware (of things or events) through the senses
discoverer: someone who is the first to observe something

perceiver (noun)	discoverer (noun)
a person who becomes aware (of things or events) through the senses	someone who is the first to observe something
	someone who is the first to think of or make something