What is it called when you do something like my mom made money madness with all the same letter at the start?

i mean like ex.


teach tommy time tables today.


sandy sells sunglasses.


mark makes mad money mondays.


natilie needs new news.


idk i forget things like this ( not an example)|||Alliteration.|||Alliteration.|||alliteration|||Alliteration|||They are alliterations.