Metabolism?
Methane is a gas. It begins with the letter m.
Methodist
Steve Martin and Steve McQueen are actors. Their name begins with the letter m.
Martini, Margarita.
Manatee.
Mediterranean Sea is a large sea. It begins with M.
Maryland is an American state. It begins with the letter M.
Miley Cyrus
* Michigan * Missouri
Malcolm In The Middle
Marge and Maggie out of 'The Simpsons' begin with the letter "M"...
MFI