Both rhyme with `board’, `cord’, and `ford’.
When you hoard something, you store it away for future use. This is often done very secretively. The word is usually used to show disapproval.
Examples: “In our country, it is common practice among merchants to hoard rice especially when there is a shortage” * “Squirrels hoard nuts for the winter, and misers hoard money.”
Horde means a very large gathering of people. It is usually an excitable crowd, often unpleasant. Like `hoard’, this word is also used to show disapproval.
Example: “Hordes of fans went to the stadium to greet Sachin on his birthday.”