Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun sapropel

1 sense of sapropel

Sense 1
sapropel -- (sludge (rich in organic matter) that accumulates at the bottom of lakes or oceans)
       => sludge, slime, goo, goop, gook, guck, gunk, muck, ooze -- (any thick, viscous matter)