It seems to me that dust and regolith are p̶e̶r̶f̶e̶c̶t̶ ̶ more or less synonyms (for the purpose of this site). I suggest we merge and synonymize. What do you think? ("Yes" answers should specify which tag becomes the primary.)
I disagree. Definition of regolith:
Regolith (/ˈrɛɡəlɪθ/)1 is a layer of loose, heterogeneous superficial deposits covering solid rock. It includes dust, soil, broken rock, and other related materials
(emphasis mine). Regolith is a superset of dust, so please don't treat them as synonyms.