inhabit vs overrun

inhabit is not a noun while overrun is a noun.

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

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

Other hyponyms of inhabit include infest, infest, invade.

inhabit (noun)	overrun (noun)
	too much production or more than expected

inhabit (verb)	overrun (verb)
be an inhabitant of or reside in	run beyond or past
be present in	seize the position of and defeat
exist or be situated within	flow or run over (a limit or brim)
	invade in great numbers
	occupy in large numbers or live on a host