Vacuum
Part of speech: noun
Definition: A region of space that contains no matter. A vacuum cleaner.
Part of speech: verb
Definition: To clean (something) with a vacuum cleaner. To use a vacuum cleaner.
Example sentence: Success doesn't happen in a vacuum. You're only as good as the people you work with and the people you work for.
Emptiness
Part of speech: noun
Definition: The state or feeling of being empty
Example sentence: Our greatest pretenses are built up not to hide the evil and the ugly in us, but our emptiness. The hardest thing to hide is something that is not there.