Two successive lines of verse that rhyme with one another are called a c. couplet.
Explanation:
In poetry, a <u>couplet</u> is a pair of lines in a verse that follows one another and rhyme. These successive rhyming lines usually have the same meter or rhythm to form a complete thought.
An example of a couplet is:
<em>"So, lovers dream a rich and long delight,
</em>
<em>But get a winter-seeming summer's night."</em>