Oblique rhyme is a rhyme in which the final sounds are close but not exact. The words may share the same vowel sound with different ending consonants, or the same consonants with different vowel sounds, so the match feels partial rather than perfect. Poets use oblique rhyme to create a subtle sense of connection without the more obvious effect of a full rhyme.
Example
The moon hung low above the bay,
A silver coin in winter air;
My thoughts drifted a mile away,
Yet left their outline hanging there.