All of these words begin with the letter "m" and "describe an elephant" (just as the words "Massive" and "Monster" might qualify) The first answer, contributed by another member, would be the most likely answer.
mammoth
monkeys
Marvelous is a synonym for good. It begins with the letter m.
-Mad-Me
Not a word, but a prefix "milli".
mercantilism
Modes.
Such a person is magnificent. Such a person is marvelous.
mice many
media
midfield player Manager
Minx