discover vs discoverer

discover is not a noun while discoverer is a noun.

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

discover (noun)	discoverer (noun)
	someone who is the first to observe something
	someone who is the first to think of or make something

discover (verb)	discoverer (verb)
get to know or become aware of, usually accidentally
identify as in botany or biology, for example
make known to the public information that was previously known only to a few people or that was meant to be kept a secret
make a discovery, make a new finding
see for the first time; make a discovery
discover or determine the existence, presence, or fact of by perception with the eyes
find unexpectedly