Dross and Gunk

Dross noun - Discarded or useless material.

Gunk and dross are semantically related in garbage topic. In some cases you can use "Gunk" instead a noun "Dross".

Gunk noun - Foul matter that mars the purity or cleanliness of something.

Dross and gunk are semantically related in garbage topic. Sometimes you can use "Dross" instead a noun "Gunk", if it concerns topics such as solid residue from liquid solution.