several;  numerous;  much;  many;  a lot;  a large/great number of ...
I have been there several times.
They differ in several particulars
There wasn't much harm done
To talk/eat/drink a lot
He has money coming out of his ears
There is abundant evidence that ...
profusely;  abundantly
To bleed/perspire profusely
poly-;  multi-
Multivitamin:   Containing many vitamins
Multiuser system