Many
Part of speech: determiner
Definition: An indefinite large number of. A collective mass of people. An indefinite large number of people or things.
Multiple
Part of speech: adjective
Definition: Having more than one element, part, component or function
Part of speech: noun
Definition: A number that may be divided by another number with no remainder; thus 14, 21 and 70 are multiples of 7Price-earnings ratio.One of a set of the same thing; a duplicate.