I’m now curious because while I was updating the Wikipedia page for Onomatopoeias, I saw two different sets of sounds for scream and shriek. The sounds listed under these two sections seem to overlap.
According to Google, both words are synonyms:
a long, loud, piercing cry expressing extreme emotion or pain.
a high-pitched piercing cry or sound; a scream.
They both seem to have almost identical meaning. (They are identical to me.) Is there any difference between these two words?