republication vs republish

republication is a noun but republish is not a noun.

Word	Noun	Adjective	Verb	Adverb
republication	Yes	No	No	No
republish	No	No	Yes	No

republication (noun)	republish (noun)
the act of publishing again
something that has been published again; a fresh publication (as of a literary work)

republication (verb)	republish (verb)
	revive (a cancelled will or a libel)
	publish again