Mushroom is one.
Marrow.
Medium Maim Mom Mum M&M
acclaim
name start with M and ends with D ,seven letters
Actually, it starts and ends with "M", but you remove the first "M" and insert an "O" ANYWHERE in the word, not just replace "M" with "O"
Some names that begin with M and end with Y:MalloryMandyMaryMolly
Four countries start with M and ends with O. They are Mexico, Monaco, Montenegro and Morocco.
Magic
musars
Money thats a start :)
Examples of adverbs that start with M and end with LY are:magicallymainlymajesticallymeaningfullymeasurablymechanicallymedicallymenacinglymerelymerrilymethodicallymiserablymonthlymorallymostlymysteriously
* elm * esteem * exam