finder vs observer

finder and observer both are nouns.

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

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

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

Other hypernyms of finder include beholder, perceiver, percipient.

finder (noun)	observer (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	an expert who observes and comments on something
someone who comes upon something after searching