'She sells seashells at the seashore' or Betty Botter bought a bit of butter but the bit of butter was bitter so Betty Botter bought a bit of better butter to make the bit of bitter butter better.
certainly, are tongue twisters but also alliterative. Alliteration occurs when the first consonant sound or sounds in words that of a line or lines of a passage or poem repeated in succession. This much we know from our earlier discussion on alliteration. Here's a little more:
It should not be confused that alliteration is in the sound of the words adjacent to each other, not just in the letters alone. However, while alliteration is emphasised as the consonant sounds, repeated vowel sounds are also considered alliterative.
Gallop apace, you fiery-footed steeds, Towards Phoebus' lodging: such a wagoner As Phaethon would whip you to the west (III.ii. 1-3)
Here, you'll note that in Juliet's speech of Shakespeare's Romeo and Juliet, the starting consonant sounds in the words fiery-footed and Phoebus are the same although the letters are different: f and ph.