overshoot vs overrun

overshoot and overrun both are nouns.

Word	Noun	Adjective	Verb	Adverb
overshoot	Yes	No	Yes	No
overrun	Yes	No	Yes	No

As verbs, overrun is a hyponym of overshoot; that is, overrun is a word with a more specific, narrower meaning than overshoot:

overshoot (noun)	overrun (noun)
an approach that fails and gives way to another attempt	too much production or more than expected

overshoot (verb)	overrun (verb)
aim too high	run beyond or past
shoot beyond or over (a target)	seize the position of and defeat
	flow or run over (a limit or brim)
	invade in great numbers
	occupy in large numbers or live on a host