It can be used with or without end rhyme.
When a rhyme occurs somewhere other than the end of a line.
With red hands, she works the bread dough.
It includes alliteration, word repetition, and rhyme. -Apex 5.2.4 Creative Writing
Luster, muster
aba
"If I were a fish I'd have but one wish"
Words that sound similar but do not share both an ending vowel and conconant.
They have a different rhyme scheme.
Perch, Latch
Park, harsh
Stars scatter in the east tonight and the clouds tatter fade?
Knowing that a rhyme is coming creates a sense of anticipation