For example the word vowel ( vah-w-ul ? or vaul ? ) it looks like a consenant, but vowel rhymes with foul ( when I say it atleast ) which has no consenant, and owl which has the w like a vowel.
2.
The standard forms of rhyme were recognised " amus " meant vowel rhyming or assonance-in which the vowels are repeated . " uaithne " consonant rhyming or consonance-the consonants are the same " uaim " alliteration-repetition of consonants