Synonyms for Amount (same or very similar meaning)
WordNet sense 1 (a quantity of money):
sum, amount of money, sum of money
WordNet sense 2 (a quantity obtained by the addition of a group of numbers):
total
WordNet sense 3 (add up in number or quantity):
come, number, number, add up
WordNet sense 4 (how much there is of something that you can quantify):
measure, quantity
From the ODE community, based on WordNet
add/edit