rephrase vs paraphrase

rephrase is not a noun while paraphrase is a noun.

Word	Noun	Adjective	Verb	Adverb
rephrase	No	No	Yes	No
paraphrase	Yes	No	Yes	No

As verbs, rephrase and paraphrase are synonyms defined as:

Other synonyms of rephrase include reword.

rephrase (noun)	paraphrase (noun)
	rewording for the purpose of clarification

rephrase (verb)	paraphrase (verb)
express the same message in different words	express the same message in different words