Greater than v/s More than

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Hi anuj,

firstly what are countable and non countable nouns..

1)What you can count and ask for " how many?' like pebbles, houses, boys,girls etc
2)what you can not count and ask for " how much?' like water, pain, happiness etc..

I may not agree with the optimus rep..
MORE is used with both countable and non countable nouns, while GREATER than is used to compare sheer numbers, or level or degree of things..
YES, fewer is used with countable nouns and less than with uncountable nouns..

examples..
there are more roses in my garden than in her garden.. OK..
there are fewer roses in my garden than in her garden.. OK
there are greater/lesses roses in my garden than in her garden.. NO because roses are countable..

however if i write..
there are a greater number of roses in my garden than in her garden.. OK

another example..
she has drank more water than me.. ok here water is non countable..

Hope it helps