Tens of thousands! Here are some options:
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -MM----M-. That is, nine letter words with 2nd letter M and 3rd letter M and 8th letter M. In alphabetical order, they are: ammoniums
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern MI--M-M. That is, seven letter words with 1st letter M and 2nd letter I and 5th letter M and 7th letter M. In alphabetical order, they are: minimum
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern M-MM--I. That is, seven letter words with 1st letter M and 3rd letter M and 4th letter M and 7th letter I. In alphabetical order, they are: mammati
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern M--M---A. That is, eight letter words with 1st letter M and 4th letter M and 8th letter A. In alphabetical order, they are: mammilla
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --M--M-A-. That is, nine letter words with 3rd letter M and 6th letter M and 8th letter A. In alphabetical order, they are: zambombas
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --M-M--I-. That is, nine letter words with 3rd letter M and 5th letter M and 8th letter I. In alphabetical order, they are: hamamelis
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --A--M-M-. That is, nine letter words with 3rd letter A and 6th letter M and 8th letter M. In alphabetical order, they are: grandmama
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-M-M---. That is, eight letter words with 1st letter I and 3rd letter M and 5th letter M. In alphabetical order, they are: immoment
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern M--A--M-A. That is, nine letter words with 1st letter M and 4th letter A and 7th letter M and 9th letter A. In alphabetical order, they are: macadamia
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern M-M-I-I-. That is, eight letter words with 1st letter M and 3rd letter M and 5th letter I and 7th letter I. In alphabetical order, they are: mammitis
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern M-MZ---M. That is, eight letter words with 1st letter M and 3rd letter M and 4th letter Z and 8th letter M. In alphabetical order, they are: mamzerim momzerim
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern M-I--M---. That is, nine letter words with 1st letter M and 3rd letter I and 6th letter M. In alphabetical order, they are: meibomian mridamgam