finder vs perceiver

finder and perceiver both are nouns.

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

As nouns, perceiver is a hypernym of finder; that is, perceiver is a word with a broader meaning than finder:

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

Other hypernyms of finder include beholder, observer, percipient.

finder (noun)	perceiver (noun)
optical device that helps a user to find the target of interest	a person who becomes aware (of things or events) through the senses
someone who is the first to observe something
someone who comes upon something after searching