Revenue
Part of speech: noun
Definition: The income returned by an investment The total income received from a given source All income generated for some political entity's treasury by taxation and other means The total sales; turnover. The net revenue, net sales.
Example sentence: If you look at firms like General Electric or other large companies, they don't just do one thing; they do many different things to generate sources of revenue.
Taxation
Part of speech: noun
Definition: The act of imposing taxes and the fact of being taxedA particular system of taxing people or companiesThe revenue gained from taxes
Example sentence: There are only three ways to meet the unpaid bills of a nation. The first is taxation. The second is repudiation. The third is inflation.