maccheroni

To most Italians, maccheroni means any short, tubular sort of pasta, like penne or rigatoni. Some varieties, especially smaller ones, are sold under the name maccheroni. And to some people, maccheroni is anything that isn't long like spaghetti.

And just to make things more confusing, some folks (especially in central Italy) will call just about any kind of pasta maccheroni. In the Abruzzo, maccheroni alla chitarra is really spaghetti alla chitarra.

maccheroncini: little straight pasta tubes, or thin golden egg noodles (maccheroncini di Campofilone) (the Marche)

maccheroni alla bobbiese: pasta prepared using a knitting needle with a stracotto sauce. From Bobbio in Piacenza province (Emilia-Romagna)

maccheroni al ferro (also called maccheroni inferrati) formed around a thin iron rod, like bucatini. If it's twisted around the iron, it's busiati.