L: awl, oil, ala.
M: aum, Mao, ama, mot.
R: oar, roe.
MF: mafia.
MV: mauve.
NM: nim, nome.
NR: Aner, Onur, noor.

HTH. I have always liked peg systems since learning of them in an applied linguistics class (from a fellow student's report). Frances yates' The Art of Memory is still a good read, too.

Ceci n'est pas un seing.