There are 444 5-letter words starting with M in the ENABLE dictionary — 5% of all 8,636 words at this length. M is a one-point tile, so the value in this list is positional rather than numerical — which of these you can play depends far more on where it fits the board than on what it scores.
The list divides into 7 groups by second letter, the largest being the 125 words with ma. Scanning the right group is faster than reading the whole list, which is why it is broken up below rather than run alphabetically.
If you know more than one letter, this page stops being the fast way to find it. Enter what you have in the unscrambler — the Contains, Starts with and Ends with filters combine, and setting both length fields to 5 narrows this list to the handful your letters actually allow.
All 444 words, by second letter
MA… (125)
maars mabes macaw maced macer maces mache macho machs macks macle macon macro madam madly madre mafia mafic mages magic magma magot magus mahoe maids maile maill mails maims mains mairs maist maize major makar maker makes makos malar males malic malls malms malmy malts malty mamas mamba mambo mamey mamie mamma mammy manas maned manes mange mango mangy mania manic manly manna manor manos manse manta manus maple maqui march marcs mares marge maria marks marls marly marry marse marsh marts marvy maser mashy masks mason massa masse massy masts match mated mater mates matey maths matin matte matts matza matzo mauds mauls maund mauts mauve maven mavie mavin mavis mawed maxes maxim maxis mayan mayas maybe mayed mayor mayos mayst mazed mazer mazes
MB… (1)
mbira
ME… (59)
meads meals mealy means meant meany meats meaty mecca medal media medic medii meeds meets meiny melds melee melic mells melon melts memos menad mends mensa mense menta menus meous meows mercy merde merer meres merge merit merks merle merls merry mesas meshy mesic mesne meson messy metal meted meter metes meths metis metre metro mewed mewls mezes mezzo