Play NYT Connections Puzzle #496 Fri, Sep 27

Find groups of four related words Need hints?

Solve NYT Connections puzzle #496 - Group 16 words into 4 categories: BANK, DUNE, HILL, MOUND, GRAVITY, IMPORT, SUBSTANCE, WEIGHT, BENCH, DRAFT, START, TRADE, ABYSS, FLY, MATRIX, THING.