sapropel vs slime

sapropel and slime both are nouns.

Word	Noun	Adjective	Verb	Adverb
sapropel	Yes	No	No	No
slime	Yes	No	Yes	No

As nouns, slime is a hypernym of sapropel; that is, slime is a word with a broader meaning than sapropel:

sapropel: sludge (rich in organic matter) that accumulates at the bottom of lakes or oceans
slime: any thick, viscous matter

Other hypernyms of sapropel include goo, gook, goop, guck, gunk, muck, ooze, sludge.

sapropel (noun)	slime (noun)
sludge (rich in organic matter) that accumulates at the bottom of lakes or oceans	any thick, viscous matter

sapropel (verb)	slime (verb)
	cover or stain with slime