One Word Substitution

There are two columns, column 1 contains a set of words & column 2 contains a set of sentences. Write the number of sentence from column 2 in the boxes given after the words in column 2 to match the write that defines the sentences of column 2 completely.

Column1		Column 2		Correct Answer
Indefensible		1 -	That which is not likely to happen.
Improbable		2 -	A grass eating animal.
Contemporaries		3 -	That which cannot be satisfied.
Anonymous		4 -	People who work together.
Colleagues		5 -	A book written by an unknown author.
Glutton		6 -	one who eats too much.
Insatiable		7 -	A flesh eating animal.
Cynic		8 -	People living at the same time.
Carnivorous		9 -	One who questions everything.
Herbivorous		10 -	That which cannot be defended.