rewriting vs rewording

rewriting and rewording both are nouns.

Word	Noun	Adjective	Verb	Adverb
rewriting	Yes	No	No	No
rewording	Yes	No	No	No

As nouns, rewording is a hyponym of rewriting; that is, rewording is a word with a more specific, narrower meaning than rewriting:

Other hyponyms of rewriting include rescript, revisal, revise, revision, recasting, rephrasing.

rewriting (noun)	rewording (noun)
editing that involves writing something again	changing a particular word or phrase