1. They are both nouns: They represent things or concepts.
2. They are both relatively short words: This makes them easy to remember and use.
3. They are both common words: While "Custom Dust" is a less common phrase, both words individually are common in the English language.
4. They can be used in a variety of contexts: Depending on the context, they can have different meanings.
5. They can be combined to create a new phrase: For example, "Custom Dust Clip" could refer to a clip specifically designed for holding dust collection bags.
However, without more context, it's difficult to say what specific connection you are looking for. Could you provide more information about what you're thinking of?