Is there a term for two differently phrased sentences with the same meaning?

Is there a term that describes the relationship between different sentences with the same meaning, in the way "synonym" describes the relationship between different words with the same meaning?

For example:

He's heavier than I am.

and

He weighs more than I do.


Solution 1:

Exactly as Jubobs said (cannot upvote your comment for some reason), from Webster definition of paraphrase:

A restatement of a text, passage, or work giving the meaning in another form.

Synonyms: rephrasing, restatement, restating, rewording