Capital market refers to the market for securities. It is a market where the companies and also the government tries to raise long term funds. Stock market and the bond market are a part of the capital market.
The new stocks and bonds are issued to investors in the primary market and existing securities are traded between investors in the secondary market. Both these markets are actually part of the Capital market.
On the other hand, Revenue market is the market that encompasses the sales revenue from the total sales revenue available in the market. It depends on the sales revenue. Which might include revenue from trading done in the capital market. These can be considered as parallel market but their scope in different.