Rhyme

Definition:
The use of the same or similar sounds either internally or at the ends of lines in order to produce an audible echo effect; when this effect is regularly repeated over the course of a poem or stanza and obeys a precise and predictable formal pattern, it is called a rhyme scheme. To avoid rhyming notes that are too blatant or insistent, modern poets sometimes use near rhyme (eg, bald, cold; brim, stream), which produces a subtler musical effect.