My favorite rhymes are sort of half-rhymes where you might just get the vowel sound the same, but it's not really a true rhyme. That gives you far more flexibility to capture the feeling you're trying to express. But sometimes it's best not to have any rhyme. Conor Oberst
Out of the simple consonants of the alphabet and our eleven vowels and diphthongs all possible syllables of a certain sort were constructed, a vowel sound being placed between two consonants. Hermann Ebbinghaus