There is no noun that directly corresponds to the verb "discard" in the sense of the action of discarding something.
However, there are several nouns that could be used to describe the result of discarding something:
1. Discard: While typically a verb, "discard" can be used as a noun to refer to something that has been discarded. This is less common but technically correct.
2. Discarded (item/object/material): This is a common way to describe something that has been thrown away.
3. Junk/Trash/Garbage: These are common terms for unwanted or discarded items.
4. Rubbish/Refuse: These are more formal terms for discarded items.
5. Scrap: This term often refers to discarded materials that might have some value.
So, depending on the context, you could use any of these nouns to describe the result of discarding something.