Question

Which of the following words is NOT an example of a countable noun?

Answer 1

"In linguistics, a count noun (also countable noun) is a common noun that can be modified by a numeral and that occurs in both singular and plural form, as well as co-occurring with quantificational determiners like every, each, several, etc."
The wiki page provides more information: http://en.wikipedia.org/wiki/Count_noun
Hope this helps :)

Answer 2

Examples of nouns that are not countable are: water, air, gravity, etc. Non-countable nouns are either abstract or measures instead of counted.