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"
The German word Seele (meaning soul) ends in eele.
A five letter word that starts with an "i" and ends with an "e" is: Note: This is a variant of endue.
kitsch
JELLO
One example of a long word that starts with "s" and ends with "r" is "supercomputer."
raze
Scam
zealot
quadruple
appointadjunctalimentailmentadament
Trout
connive contrive