Hay otras posibilidades de describir un gran número de una cosa, aunque algunas de estas expresiones forman parte del lenguaje coloquial.

Resumen
  lenguaje estandard singular (incontable) plural (contable)
    a great deal of
a good deal of
a good many
a great many
    a small amount of
a large quantity of
a great number of
a good number of
a large number of
  lenguaje coloquial    
    a lot of
lots of
plenty of
a lot of
lots of
plenty of



Ejemplos  
  I found a great deal of sand in my kitchen; I do not understand how it got there.
  She has a great many children to feed.
  There is a good deal of work to do, before we are ready for the presentation.
  There are a great many open questions to answer.
  A small amount of food was left for him.
  A great number of mistakes were to be found in the first version.
  In the sea, there is a large quantity of water.
  In the lake, there are a good number of fish.
  A large number of photos were taken.
  A lot of time has passed.
  A lot of fans wait outside.
  Lots of milk went sour last week.
  Lots of apples can be found in our garden.
  There is plenty of air in the room; still I cannot breath.
  There are plenty of women waiting for Mr. Right.






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